YouTube Downloader can download videos from these sites:

1. Youtube
2. BadJoJo
3. BBC.co.uk
4. Bing Video
5. Blip.tv
6. Bofunk
7. Break
8. CollegeHumor
9. Crackle
10. DailyHaHa
11. DailyMotion
12. EbaumsWorld
13. ESPN Videos
14. Facebook
15. FunnyOrDie
16. Gaytube
17. GodTube
18. Google Video
19. Hentaimedia
20. LiveLeak
21. MeFeedia
22. Metacafe
23. Myspace Video
24. Pornhost
25. Pornhub
26. PornoTube
27. RedTube
28. Sevenload
29. Shufuni
30. Slutload
31. Spankwire
32. Stickam
33. Streetfire.net
34. Tangle
35. ThatVideoSite
36. TNAflix
37. Tontuyau
38. Tube8
39. Ustream.tv
40. Vevo
41. VideoClipsDump
42. VideoJug
43. Videu.de
44. Vimeo
45. Worldstarhiphop
46. Xhamster
47. XNXX
48. Xtube
49. XVideoHost
50. XVideos
51. Yahoo Video
52. YouJizz
53. YouPorn
54. Yuvutu
55. Zorpia