this is "nightline." >> tonight he's one of the biggest names in the porn industry. once held as porn's feminist sweetheart, james dean now denying claims of sexual assault after three welcome forward with allegations. celebrities like adel, taylor swift and beyonce commands attention but thihis online entertainer is the one to beat. with a larger following than those a-listers combined. gaming google pewdiepie. and hover boards are the holthot holiday gift taking off this festive season but reports say some are literally feeling the heat. could some pose a threat of fire? but first, the ""nightline 5"." >> he said, sure. but don't get just any one, get one inspired by dentntists.

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seconds. good evening. thanks for joining us. james dean is arguably the most popular male star in the adu film industry. but porn's poster boy who preaches respect for women and safe boundaries now publicly y stds accused by several women of sexual assault. serious accusations prompting mayor fallout in his otherwise

james dean, the cute guy with the sheepish grin has built an entire porn empire on his boy next door persona. >> i am actually a big believever in -- in romantic love and i am a hopeless romantic. >> seen here on daily beast tv he is arguably the most popular male star in the $13 billion american adult film industry. appealing to female fans as the eet sensitive guy, racking up mainstream credits like "the canyons" opposite lindsay lohan. and building a lowial following on social media.a. at cefully crafted image of the feminist sweetheart was tarnished this weekend when his ex-girlfriend and once frequent costar accused him of rape on twitter. writing on saturday, james dean he me down while i said no, stopped. used my safe word. i just can't nod and smile when

stoya's rape allegation made it a trending hashtag. >> stoya is beyond honest. >> cross is stoya's friend and business partner. >> she a i have discussed this before. this has been something that's been eating her up for quite some time. and she struggled with whether to say something because the cons are so much greater than what she perceived the pros to be. i mean, the pros are obviously the behavior stopped and she can, you know,he can get that weight off of her shouldlder. she doesn't have to be silent about it anymore. stoya's accusations prompting two other actresses coming forward against dean, stirring questions about consent and perceived blurred lines between work in the s industry and actual sexual assault. >> typically the statute of limitations is sex years for rape in cacalifornia but you're going to need a colaint. you're going to need someone who is not just going to go on social media, but going to go to

person charged. >> reporter: dean has not been charge with the crime and has denied stoya's accusations on twitter. saying, there has been egregious claims made against me on social media. these allegations are both false and defamatory. i respect women and i know and respect limits both professionally and privately. we reached out to dean but he did not respond with comment beyond what he tweeted. he did not address porn star ashleigh fire's story to the daily beast that dean allegedly sexually assaulted her at a communal shower in a porn studio. another actress alleging yet another similar assault writing, i was afraid. james dean ruthlessly attacked and degrading me leaving me with mental wounds that took years to heal. >> there are of course commentators who say it's not rape, it's just trespassing if you're a sex worker. but the overwrwhelmingg majority s stepped in support of stoya. >> can he file a defamation suit before a lawsuit is filed

>> if he files a suit, all of this becomes fair game. so for him to file a lawsuit, he better be telling the truth, that none of this happened because otherwise, he's going to be exposed not just in the court of public opinion but in a court of law. >> you can't take this one man as a representation of our industry. he acts on his own. we don't support that. it's one personn w has crossed the boundaries of too many women and so many isolated situauations that he hasn't been stoed until now. >> reporter: but the multiple accusations did prompt several studios to act swiftly on just the allegations alone. kink, a porn studio specializing in rough sex dropped their highest profile male ststar. another studio evil angels suspended sales of dean's videos saying it's s so contrary to our company values. and the adult performer advocacy committee accepting dean's

vowing to, quote, stand with performers and other sex workers who are victims of any sort of sexual assault. >> there are still names out ere and they may say something, they may not. and that's their call feelings have always been if you were the victim, it's your story, protect it. you do with it what you want, what you will. >> people look down on the porn industry and look down it as being a seedy, dirty thing. when push came to shove they rallied behind her. i think that is awesome. >> reporter: amelia mcdonald perry is the editor in chich of the frisky, a lifestyle blog nor women where deen was a featured sex columnist. >> for the most part i liked his advice. i led the fact it was focused on consent, focus and communication. and that he was very -- he emphasized it wasn't a one size fits all approach to having good sex or being good in bed. i liked that. i thought it gave anybody reading the column the kind of -- my hope was that it gave

explore and to try new things with their partners. >> rorter: the site has killed all future columns. >> i still think the advice itself was good but who iwas coming from now, it's -- who knows if it -- if it was genuine. >> reporter: and for some, that's the irony, deen has always preached the idea of respect and boundaries seen here in the web series, girl spot. >> what are the key pointers you like to talk to college campuses about? >> sexual education, let's dress thatt firstecause that is quick and easy, respect, consent, you know -- >> amean, i'm so glad you said consent. >>eporter: discrepancy causi amelia to give deen a sex advice column alone. >> i've been working with him o on a sex column for a website targeted at women, was -- i -- it's among -- it's kind of like this worst thing i've ever had to deal with in my professnal career.

allegations could hurt deen's mainstream appeal but stoya's friend kayden is not sorry. >> i'm proud of her. i'm proud the people who are standing up to support sex workers, to support women,o absolutely put their foot down and say there's no gray area. i'm glad that it happened in a a public place because it sends the loudest and clelearest message it can send. up next, the wildly popular social media mogul turning clicks on youtube into fame and fortune. and hover boards, the safety concerns you need to know about this hot holiday gift item.t. what about my family? my li'l buddy? and what if this happened again? i was given warfarin in the hospital but i wondered if this was the right treatment for me. then my doctor told me about eliquis. eliquis treats dvt and pe blood clots and reduces the risk of them happening again.

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he enjoys twice the number of youtube subscribers as one direction but he's far from a household name. he's the new breed of celebrity bringing social media success into mainstream stardom. tonight our colleague and yahoo! global news anchor kat couric goesehind the scenes of 26-year-old internet mega star

star >> reporter: adel's latest album may be baking records but when it com to the world of youtube, adele, taylor swift and beyonce combined can't top this guy's numbers. >> they call him pewdiepie. famo for recording himself playing video games. >> oh, my god. what the [ bleep ]. i can't find the blooes now? >> how did you get the name pewdiepie? >> any gamer, i guess, will have a nickckname. i would nick pew like the lasers, pew pew. and i would yell out pewdiepie whenever i did well in games and people would laugh. i went with it. >> they told m i could become anything.

most popular channel on youtube with over 40 million subscribers. his videos now seen over 10 billion times. when t the numbers started to climb though, i mean, it must have been a little mind blowing for you. was it? >> i never expected it. i never been the popular guy or whater. to all of a sudden be in this situation where there's soo my people who loves what you do and appreciates what you do, that's amazing. i couldn't be happier about it. >> reporter: it all started five years ago when the swedish gamer began uploading videos of himself playing games along with some colorful commentary. >> it's at least 7.5. people watch for many different reasons. maybe you watch someone else play the game because you want to learn about the game. you want to become better at the game. kind of like you watch sports, i would say. for me it's different. no one watcheses me t get better at games. people watch me to just be entertained and f feel l le they're hanging out. >> never let go.

you're hanging out w with the -- they're hanging out with a friend. >> in a sense, yeah. that's part of the appeal. yeah. >> what's the other part? >> it's funny. i hope. >> don't patronize me hasselhoff, i can do it, too. >> and pewdiepie has turned his millions of views into a profit. >> it's coming from my knee. >> reporter: his monthly earnings estimated to reach up to $1.4 million. i guess for a whole host of reasons you decided i'm going to quit schchool and i'm going to start making these videos. right? >> i just felt like i was on the wrong path in life. it wasn't really what i'd wanted to do. and i saw that there was this opportunity over here that seemed insane and seemed too good to be true but i wanted to give it a shot at least and i'm here now and i'm luckyt worked out. >> i feel so freakin' pumped to play thi game. >>hat did your parents think? i know your parents are quite successful kind of corporate

how did they feel when you said, hey, this is what it want to do? did they think you were nuts? >> i think any parent would think that, yeah. but i think once they saw the fan reaction they understood it meant so much to so many people what i was doing, that's when they reazed, okay, this is actually a a thin >> reporter: it's a trend now being referred to as t let's play phenomenon where watching someone play a video game is as entertaining as playing the game itself. in fact, it's so popular that the website twitch which streams live let'slay videos has reached the fourth most visited site on the web, above facebook and amazon. meanwhile, the pewdiepie brand continues to grow. >> this is katie couc playing with pewdiepie and we're playing the game that you actually created. i couldn't call it a day without stepping in to pewdiepie' world. >> let's go to level one. i can tell you're anxious to play. >> ye.

>> a duck. >> a duck. let's me go down stairs. >> why are you swearing. you can't do that? >> sorry. we're going to have to bleep this out. shoot. >> yeah! >> where am i i ing? >> go right. go right. go right. >> yes. >> yes, you're doing amazing. jump, jump, jump. no, tap it. [ bleep ]. >> that's okay. you killed my dog. no big deal. >> after a few homes i realize why so many viewers come back for more. >> this is calm down. i love that. >> you have a whole group of to lowers that call themselves the bro army. >> the bros. the bros, yeah. >> where did this whole bros thing come from? >> it started ironically a long time ago. i would may play horror games to make myself less scared i would call him bro. and it just spawned from there. >> even the girls who follow you are called bros, right? >> no one h a problem with that. >> surprising perhaps, maybe not

>> i think that's cool. especially with gaming or whatever, i think most people think it's just guys. but it's cool to see that anyone can enjoy it then i've de my job. >> this loyal fan base is following him as he launches new ventures. >> am i signing all of these? >> reporter: his first book number one on "the new york times" young adult paperback best-seller list. next year he will be releasing a w series of youtube called "scare pewdiepie." >> do you think at some point you will be too old to be pewdpie? >> yeah, ridiculous. like i'm 70 and i'm just sitting there playing games. commentating like i am now. i feel like already in these five years my content has evolved a lot and i think it will keep evolving. >> do you see yourself continuing to do this or do you want to use this as a springboard for other opportunities? >> it's true. a lot of people do want to use youtube as springboard.

passion for gaming. that's what i want to keep doing. >> making me so anxious. >> reporter: for "nightline," i'm katie couric in new york. >> as they say, stay tuned. for katie's full interview go to yahoo!.com/katiecouric. up next, the hottest gadget trend this gift giving season. could conrns over safety? abc "nightline" brought to you by pfizer. i re had a lot on my mind when i got out of the hospital after a dvt blood clot. what about my family? my li'l buddy? and what if this happened again? i was given warfarin in the hospital but i wondered if thisas the right treatment for me. then my doctor told me about eliquis. eliquis treats dvt and pe blood clots and reduces the risk of them happening again. not only does eliquis treat dvt and pe blood clots, but eliquis also had significantly less major bleeding than the standard treatment. knowining elui had both... turned around my thinking.

eliquis can cause serious and in rare cases fatal bleeding. don't take eliquis if you have an artificial heart valve or abnormal bleeding. if you had a spinal injection while on eliquis call your doctor right away if you have tingling, numbness, or muscle weakness. while taking eliquis, you may bruise more easily... and it may take longer than usual for bleeding to stop. seek immediate medical care for sudden signs of bleeding, like unusual bruising. eliquis may increase your bleeding risk if you take certain medicines. tell your doctor about all planned medical or dental procedur. eliquis treats dvt & pe blood clots. plus had less major bleeding. both made switching to eliquis right for me. ask your doctor if it's right for you. innovavative sonare technology with up to 27% more brush movements versus oral b. get healthier gums in 2 weeks guaranteed. innovation and you. philips sonicare save when you buy the most loved

hoverboards, it's this season's hottest toy, coolest gadget, and slickest thrill ride rolled into one. turning sci-fi dreams into a

boards catching fire raising me safety concerns tonight. here's abc's matt gutman. >> hoverboard. >> what once seemed to be the stuff of science fiction in "back to the future" has morphed into the must have holiday gift of the present. >> you got that turned down. >> reporter: more than a million watched kendall jenner go through the house and the bieb himself gave it a whirl. hoverboard, self balancing scooters, are flying off shelves. on cyberonday one sold every 12 seconds just on ebay. >> they're flashy. they're kind of practical in that you can move a little bit faster on them. but really they're fun and zippy and you can show off on them. >> i'm boxing here. >> reporter: on youtube on boxing videos are scoring millions of views. but with every new craze, new rus. cleveland cavaliers bannened them from their arena. sorry, lebron.

and sidewalks of new york city and starting january 1st, also banned here in california from sidewalks. the only place you will be able to ride them is on pathways andnd bike lanes. some even calling them dangerous. >> it's on fire! >> reporter: the owner of this scooter claims it spontaneously cocome busted, bursted into flames. he was all g grins wn he got a scooter for his birthday but a day later his mother say something went wrong. >> sparks j jt flying. the middle part of the board just poof into flames. >> reporter: his mother says she couldn't put out the fire and it consumed their entire home. the cause of that fire is still under investigation. >> there have been so many. different knockoffs put out. something feels like it's hundreds of dollars less than the next model, tre's probably a reason. >> reporter: another safety concern to deal with, wipg out. as we learned the first few moments are jerky.

worse hoverboard fails. expertss urg kids to wear helmets and their parents to avoid the cheaper knockoff versions, so you might have to shell o out a few hundred extra bucks to get the real thing. >> as with all new technologies, they're likely to improve rapidly and the cost is likely to come down rapidly. if you can't get one this year, don't be too upset because next year they will probably be half e price. >> reporter: or it's possible you could get something even cooler. lexus is developing this one that actually levitates. >> everything you know, this is it. >> reporter: skateboard legend tony hawk is helping developers with hendo with their design. but for now, got to keep working on figuring out this one. abc news for "nightline." >> thanks for watching. tune in to "good morning america" first thing in the

as always, online 24/7n our "nightline" facebook page and abcnews.com. good night, america. the insider from hollywood, your 24/7 celebrity conversation. >> obviously you don't want to be called fat but i'm pregnant. i would hope to gain some weight. >> then fat shamedagain. how one word silenced the haters. >> that is just disgusting to talk about a pregnant person's weight. >> as kardashian clan rallies around kim. >> i've be bullied my whole life. >> kylee is embroiled in a new controversy s her golden