In the world of user created videos the big name is YouTube followed by Vimeo. Using either of these can be quite fun and, if you are a business, very lucrative. However, both have their downsides to them as anyone that has used them ca attest. Many of these issues seemed to show up right after Google bought YouTube although to be perfectly honest some of them (odd rankings, copyright problems etc) were always present with the service. However, most of us have been stuck with one or both of these services simply because there is no alternative with the same user base and reach.