Maurice, here's why I like Vimeo over You Tube:
Both are captured at 480p, and yet the Vimeo looks a whole lot better to my untrained eye.
And Halliwell, thanks again!
My experience with YouTube is that initially the video looks like crap, as if they first do a real fast and lossy conversion just to get it up there, and then it gets better as they finish more refined conversions. I found this with the music videos I shoot at 1080p, and we've learned not to make them public until the processed image quality shapes up.
That said, I haven't uploaded anything 480i or 480p in a while so I don't know how good a job it does with those