Insert facepalm pic here.
Note that I work for a market research firm, and a very large one at that. We have analysts galore that track all industries, from beauty and fashion accessories, to video games and television ...even the Internet. Google happens to be a client of ours. Analysts will say anything you want them to say as long as the checks continue to clear. Analysts tend to be shills. I never, ever pay attention to anything that "analysts" say - Wall Street or otherwise.
So, I'm not going to budge. I don't think YouTube has changed our entire society OR how we look at media. Has it changed our society and media on some level? Sure it has, but so has yousuckmycock.com. Try debating this with someone who doesn't use the Internet or watch television (yes, approx. 15% of US households can't be bothered with either television or the Interwebz). It's all relative.