Where can I safely and easily get mp4 files?

i'm sorry the only way you get .MP4 files or download youtube videos, you could use tubesock and download videos from youtube. But it will be a flash format, and this is when your next question comes in! download the program a href="http://www.any-video-converter.com/" rel="nofollow"http://www.any-video-converter.com//a it will convert all of your formats for you, the free version is at the bottom of the page