. >> reporter: sean spalla is a high school student in santa clarita, california. as a child, he was diagnosed with something known as soto's syndrome. >> it's an overgrowth syndrome, and it affects their whole body. >> reporter: as a young boy, sean looked different than the other kids, and being different made him an easy target for bullies. but as he grew older, he found a way to escape them by making videos and posting them on youtube. >> it's the best thing that's ever happened to me besides high school. and it's like a way for me to be welcome in the world. >> reporter: but hackers changed all that when someone took over sean's youtube identity. >> it was like you were looking at someone pretending to be you. >> he had tons of videos, and the guy renamed all of them horrible, horrible, ugly things. >> reporter: it took some time, but youtube eventually took down the awful images that the hackers posted. sean and his mom are still upset, though. so they've taken their case to the local sheriff's department and even contacted the fbi. >> whoever you are who did