The sites mentioned above are all great, but we try as well to upload or cut a deal with local internet distributors.
If you want to target the UK, for example, I know that LoveFilm is a good platform. Of course you need to get a deal before.
This is exactly how I feel too, although YouTube's HD has greatly improved in the last 2 years, but I still upload and participate a lot on VIMEO still too.
For those interested, you can upload to many sites all at once with a ton of cool tracking and other info at www.tubemogul.com which I've been using for years.
I also like Vimeo... I like youtube... but Vimeo feels more designed towards indie making, where as Youtube has slowly deteriorated in community to the point where its mainly run by companies like Vevo..... Dailymotion is ok but I feel their website is clunky and a pain to navigate.
Also, I'd stay the hell away from Metacafe. It's a slower, more annoying version of Youtube with terrible layout I can't stand to even look at, but that's my opinion.
So yeah, I like Vimeo the best, and youtube after that...