Youtube Downloader is simply that. Access youtube just as you would any other mobile browser. Once you find a video you like, click the play button. Youtube Downloader will give you the option of playing the video or downloading it to your phone. The app converts the file to mpeg-4 video as it is downloaded.
Pros: Mpeg-4 conversion is a win, especially if you need to pull a file into a video editing program such as Final Cut Pro or Avid. Video quality doesn't suffer when compared to the original video upload.
Cons: Video files will eat away at your phone's available storage. The video conversion also affects the download speed, which makes me think that the conversion takes place on an external server (not certain of this, though).
Click here to download the app.
App Score: 4.5/5