YouTube Mp4 Downloader

This add-on with simple interface and YouTube integration helps you downloading videos in MP4 and FLV directly from YouTube.

Supported Formats
MP4 360p (384×288, 480×360, 640×360)
MP4 720p (1280×720)
FLV 240p (426×240)

Recommended Video Players:
After downloading videos you can play them using free applications like
VLC, it is the most recommended player. It works well for OS Windows, Mac, Linux; plays both MP4 and FLV videos.
Windows Media Player 12 is recommended video player for Windows 7; plays only MP4 videos.
iTunes and QuickTime Player is for OS Windows, Mac; plays only MP4 videos.

Additional notes:
MP4 360p videos are better suited for older smartphones like iPhone 3GS, HTC Desire, Galaxy S/S2;
MP4 720p videos are great for more recent smartphones (iPhone 4S/5/5s, Galaxy S3), 7-inch tablets and older 10-inch tablets (iPad ½).
1080p videos work better on latest iPad, Nexus 10 and other high-resolution tablets and smartphones.

Known issue:
480p FLV and 1080p MP4 are no longer available as standalone videos downloaded from Youtube.com.