The jailbreak community is brilliant at coming up with apps that would never see the light of day if they had to go through Apple's App Store, and one such app is YoutubeToMP3.
After a long wait, iPad version of “YourTube” has finally arrived on Cydia by the name of “YourTube HD”. For those of you who don’t know, YourTube is a popular program for jailbroken iOS devices which can be used to save or download videos from YouTube right on your iPhone, iPod touch and now even on iPad !
The following tutorial will enable you to move your downloaded Youtube videos on your iPhone to the camera roll app. This will give you complete video editing capabilities of iPhone 3GS with which you can trim and share your downloaded videos on your iPhone, and then sync them with your PC or Mac. You can also make it work with your iPhone 2G, 3G and iPod touch by first following the tutorial posted here on How-to: Enable iPhone 3GS Video Editing and Camera Roll in iPhone 3G, 2G and iPod touch before following the guide posted below.