Metacafe.com
This site is geared more heavily toward monetization and thus the content may sometimes be very specific. Guides, walkthroughs, DIY and other types of specific content will be available. The content that is allowed is somewhere in between YouTube's lax regulations and the very strict posting rules that govern Vimeo. If you're a specialist looking to sell your professional videos, this is the best way to go. Of course, you can also find movies, music and a bunch of other different videos that may not be geared towards being helpful. Also, a lot of the content is a direct copy of YouTube and therefore the chance to get less than original content is bigger here.
Hulu
The Hulu platform was NBC's manner of allowing TV contents to be streamed online as well. This, in turn, generates revenue for them and the viewers are able to watch current episodes of the network's TV shows and other content that was initially designed for the small screen.
Hulu, however, no longer enables people to use the content on their blogs or sites, embedding has been denied, which, although understandable given the network exclusive content, is a little upsetting. Another issue that many people with slow or mobile connections don't necessarily like is the mandatory 360p video resolution. This not only takes longer to load but it also has negative effects on 240p videos that are upscale. These become blocky, almost unwatchable over time. Of course, no content from third parties is allowed unless approved by the site.
Veoh
Veoh is the rare bird kind of site as it offers content that was initially hosted on a number of networks. You can find content from many different networks and you can simply see whatever you like, when you want to. That of course is not the only content available. If you make an account, you will be able to post your own movies and the range of accepted materials spans for really different sectors of interest. You can find animations, user created videos, music, etc.
In spite of the fact that Veoh is newer, the streaming is excellent, there are less latency times even for the videos that are not considered a priority, namely the ones with very few view-counts. In terms of openness, the site also excels. All content is available as a download and you can pick and choose your own movies and create your own private collection of the things you most like.
Overall, the presented sites receive the biggest number of visitors, have content that is constantly being uploaded and commented by the community. Pick the site that you find most in tune with your taste or the site that offers the content that you are interested in at the moment.
Online Video Sites : Part 1

