How to download videos from all popular video sharing sites like YouTube, Blip.tv, Vimeo, MySpace and Metacafe?

Quick Answer: KeepVid.com

Keep It!
Drag the above button to your bookmarks toolbar. Next time you are in a video page, click it to get the download links.

In addition to the flv file, keepvid also gives you the link to the better quality mp4 file, if one is available.
KeepVid.com supports a large number of video sharing sites:

  1. Google Videos
  2. Youtube
  3. Break.com
  4. iFilm
  5. Putfile
  6. Angry Alien
  7. ArtistDirect
  8. Blastro
  9. Blennus
  10. Blip.tv
  11. Bofunk
  12. Bolt
  13. Castpost
  14. Current TV
  15. Dailymotion
  16. DevilDucky
  17. FindVideos
  18. Free Video Blog
  19. Grinvi (NSFW)
  20. grouper
  21. Hiphopdeal
  22. LuluTV
  23. Midis.biz
  24. Music.com
  25. MusicVideoCodes.info
  26. Myspace
  27. Newgrounds
  28. PcPlanets
  29. Pixparty
  30. REVVER
  31. sharkle
  32. StreetFire
  33. That Video Site
  34. The One Network
  35. VideoCodes4U
  36. VideoCodeZone
  37. vidiLife
  38. Vimeo
  39. vSocial
  40. Web62.com
  41. ZippyVideos


What other tools have you found useful? Please share in the comments.