How to Download YouTube movies and convert themYou can download you tube movies with youtube downloader application, (download app by clicking on application icon next to this post)
copy the link of page in application download section and start downloading, you can also watch the movie by this application,For converting the movies downloaded from you tube with FLV extension go to convert tab, brows your file and start converting.Suggestion:I suggest you not to convert the FLV files, because in many cases you may have BAD SOUND and noises in converted movie also the file size will increase, BEST WAY TO WATCH FLV MOVIES IS FLV PLAYER witch you can download setup file HERE
How to Download YouTube movies and convert them
You can download you tube movies with youtube downloader application, (download app by clicking on application icon next to this post)

Suggestion:
I suggest you not to convert the FLV files, because in many cases you may have BAD SOUND and noises in converted movie also the file size will increase, BEST WAY TO WATCH FLV MOVIES IS FLV PLAYER witch you can download setup file HERE
Copy Trans Manager:
This software is one of best alternatives to iTunes specially for transferring (Sync) musics and videos to your iPhone, iPod touch or iPad. Really easy to use, you can also download your iPhone's musics to your PC. Download and uploading the musics or videos would not replace or remove the musics from your iDevice like when you sync'em with iTunes while they are removed from PC due to low disk space.
It's a free software from www.copytrans.net