A number of staff have asked about showing online media in their classroom and sadly, many of the sites they use personally are filtered here in educationland and sadly I dont have time to support them individually, so here is my online response.
In addition to watching online media you can store, ‘grab’ or convert files that you may wish to use at a later date. My favourite solution is to use Zamzar (but there is also keepvid ). Alternatively, grab youtube videos with this small applications you download onto your PC or online, for example YouTubeGrabber but dont forget you will need a Flash Video Player to watch or display them.