. >> reporter: case in point, colleen ballenger and josh evans. they're? branton, missouri.sh's birthday. they've been dating for five years. and, you guessed it josh is about to pop the question. the proposal captured for posterity on video. >> will you marry me? >> yes, of course. >> reporter: and posted to youtube. 2,600,000 views and counting. >> you guys make a living at this? >> we do. >> i have a tour so there's some income from that. then on youtube there's ad revenue. >> stop! >> reporter: there are some things you won't see on their youtube channel. >> so weird. >> what about sex? >> what about sex? >> do we see it? >> no! >> absolutely. >> it's not that kind of a channel, my god. >> reporter: but their channels are hugely successful. colleen and josh have 500 million views between them. >> sometimes i like to take baths -- >> reporter: she has two youtube personalities. appearing as her wacky alter ego myrrh ran dashes other times as herself. >> look how wild she is. >> reporter: miranda was featured on "comedians in cars getting coffee," jerry seinfeld's online c