Download youtube videos as MP4

Hi.. so far we've downloaded the you tube videos as FLV files. If you want to download them as MP4 videos, you should check out this post.

To download the MP4 files, you need to use the same URL like for FLV files and append "&fmt=18":

http://www.youtube.com/get_video?video_id=ID&t=SIGNATURE&fmt=18

ID is the video's identification value, SIGNATURE is a value that prevents you from downloading the file just by knowing the ID. You could create this URL by looking at the source code of a YouTube page.