Youtube a mp4 firefox
Download YouTube Videos as MP4 by ialc. An extension that adds direct links to download YouTube videos as MP4 and FLV. It has a See complete version history · See all 445 user reviews · Ialc.
Supports all available YouTube formats (MP4, FLV, WebM, 3GP) for any video This is a group of addons which help firefox users download online videos.