If you are looking for one of the simplest ways of downloading YouTube videos around, you've come to the right place. Easy YouTube Video Downloader is an easy, fast and reliable add-on for Firefox that will let you do exactly what it says on the tin - download YouTube videos.
Once you install Easy YouTube Video Downloader, open YouTube. When you watch a video, you'll see that the add-on has appeared on the information sheet in the top right hand corner of the video, beneath the embedding options. You can download in several formats - FLV, 3GP, MP4, MP3 and also the two high-definition varieties: 720p HD and 1080p Full HD.
The videos are downloaded using Firefox's normal downloader. Easy YouTube Video Downloader also worked with my download accelerator, but it didn't automatically recognize the name of the video. Even so, downloading YouTube videos with Easy YouTube Video Downloader couldn't have been simpler.