OxyTube is a great web application that allows you to search 6 major video websites at the same time. Just go to OxyTube.com, enter your keyword and get results from YouTube, Vimeo, Hulu, AOL Music, Daily Motion and Google Video.
You can either click on a result to play the video directly from the host or download it to your hard drive. The results contain details including date added, number of views, length and even rating. You can sort the results using any of these fields.
You can also choose to search only selected websites or search all of them. Your results are updated automatically when you select or de-select a website from your search. A browser plugin for OxyTube lets you add it to your browser as a search engine so video search becomes even easier.