I'm considering writing a post about vidding for Symposium Blog this week in honor of VividCon, so I thought I'd toss out a question:

As I'm eagerly devouring all the new vids that are coming out, I can't help but notice that for vidders who post streaming versions of their vids, most aren't hosted on YouTube. I see stuff on various Ning vid communities, Vimeo, a couple others, and occasionally self-hosted, but YouTube seems pretty rare, at least as a first choice for streaming vids.

So here's my question -- why not YouTube?

Is it because of:

Video quality?
Advertising?
Concerns re: greater vulnerability to takedown notices from copyright holders?
Privacy/obscurity (e.g. having some control over the audience that sees your vids, rather than anybody potentially stumbling across them)?
Something else?

I'm curious! And also hoping to use responses as fodder for a blog post -- if I get enough answers to write something up, I'll link back to this post but quote from comments w/out names ["one vidder said, 'YouTube killed my parents!'"] unless you explicitly give me permission to use your name. And of course you can also comment anonymously, or ask me to screen your comment.

Thanks!