Oh wow.... I can't tell you when I first watched youtube, I was probably about 21 or so.... but I CAN tell you when I first became aware that youtube was a community. I watched it for years like it was just a video wasteland, just a place to be entertained, and somehow never really paid attention or thought anything of it when I saw a "subscribe" annotation or anything like that, it was about oh I dunno... I want to say maybe a year ago? Something like that, that I was looking up stuff, and I kept realizing that this same dude was popping up all over the place and I was like "who the heck IS that???" And it was Shane Dawson, and I was like "why does he pop up on sooo much stuff that I search???" Cause I wasn't clicking his links, I was just going "there he is AGAIN!!!" So I finally watched one of his videos and it became clear to me I was like "this dude has an empire, he's living off of youtube" I didn't realize people DID that. I thought youtube was just tons of "kid gets punched" "Baby laughs real hard" You know I thought it was like an endless "america's funniest home videos"
Now granted I had wanted to make my own youtube channel for years prior to that, but I didn't realize that it could make me money, nor did I realize I could build a subscriber base, I thought it was a crap shoot to just see if lots of people would send links of the video, I didn't realize you could actually build a fanbase and a sub base. So yes, Shane Dawson about a year ago, made youtube "click" in my brain. When I first saw a video off youtube? No idea, but that was when it first made sense to me and I understood this was a community, not a gigantic TV set.