Easy YouTube downloader lets you download the YouTube videos in FLV, MP4 and 3GP formats. You can download the videos from its website, or you can install the Greesemonkey script and download the videos directly on YouTube website.
For free account, you can download 4 videos a day. Besides 3GP and MP4, Gazzump also lets you download YouTube videos in MP3, WAV, FLV and other formats.
You can watch the YouTube videos on KeepHD, and the videos can be downloaded in 3GP, MP4 or FLV format. The MP4 quality is quite nice, but the 3GP quality is not good enough.
KeepTube lets you download YouTube videos in FLV, 3GP and MP4 formats.
YouTubeKeep.com also lets you download YouTube videos in 3GP, MP4 and FLV formats.
Just Input the YouTube video URL, then you can download the video in FLV, 3GP, MP4 or MP3 format.
With Zamzar, you can convert a YouTube video to many formats, such as 3GP, MP4, RMVB, and so on. But you need to input your email address to get the download link.
The above 7 web apps are websites that let you download YouTube videos in MP4 or 3GP format online for free, besides, there are also some Firefox add-ons for you to do the same things:
Video DownloadHelper is a famous Firefox add-on, you can download videos from YouTube as well as nearly all the other video websites. To download the video in 3GP format, you will need to install an extra desktop software on your computer.
The Firefox add-on Easy YouTube Video Downloader will let you download YouTube videos in FLV, 3GP, MP4 or MP3 format easily.
Besides computer, you can also download YouTube videos in MP4 or 3GP format from your mobile phone directly with below web app:
Cupish.com is only available for mobile browser, you can search and download the YouTube videos in 3GP or MP4 format, or you can watch them directly. By the way, there will be “CUPISH.COM” added in the downloaded video, and large videos are not available for download.