Films and Videos and Internet TV
Miro (open source app for viewing videos) http://www.getmiro.com/
Vimeo http://www.vimeo.com/
Filmschatten http://filmschatten.blogspot.com/
Flick By Flick http://www.flickbyflick.com/
Like Television http://liketelevision.com/
Blip TV http://blip.tv/
Turner Classic Movies http://www.tcm.com/mediaroom/index.jsp
PeekVid http://www.peekvid.com/
Veoh
Guba
Boxsweeper
TrueVeo
YouTube http://www.youtube.com Lets you subscribe to various producers, and then get an email of updates about new videos added to your subscriptions.
Google Videos
Meta Cafe
My Damn Channel http://mydamnchannel.com/
Philmform http://www.philmforum.com/
Quick Silver Screen http://quicksilverscreen.com/
Joost http://www.joost.com
Hulu http://www.hulu.com
How to Watch TV on Your Computer http://www.instructables.com/id/How-to-watch-TV-on-your-Computer-for-free-Legall/
Any TV http://www.anytvplayer.com/
Viddler http://www.viddler.com/
Disocery Channel / TLC / Animal Planet http://video.discovery.com/
Streaming TV Episodes http://streamingtvepisodes.com/
FreeTube http://www.freetube.us.tc/