YouTube is one of the most crowded websites that contain plenty of videos. It is the most appreciated site and got a huge number of visitors because of its HD video qualities that cover videos on almost all kind of topics. You can find there videos beginning from the oldest to the latest and even upload and share them. The only thing YouTube doesn’t offer is to download their videos officially. In that case visitors need to use third party applications and softwares in order to download YouTube videos. There are a number of unofficial sites that offer downloading such videos free of cost and without any hassle. Simply copy and paste the video url in the site to download your desired videos and enjoy them offline anywhere. Below listed are the best sites that offer downloading Youtube videos.

1. Keepvid: Apart from downloading YouTube videos, Keepvid supports other popular websites like Dailymotion, 4shared, Facebook, Metacafe, Vimeo and other popular sites for downloading videos. You can download videos in mp4, 3gp, mp3, webM and flv formats.
2. Savevid: Supports YouTube, Metacafe and Google Videos like sites and download videos in flv, avi, mov, 3gp, mpg and wmv formats.
3. Zamzar: Converts video file to 3gp, avi, wmv, flv and mp4 formats and sends the transformed file to your email address.
4. SaveTube: Downloads your video file to 3gp, flv and mp4 formats. Simply copy and paste the video url to download your preferred file.
5. Catchvideo: Catchvideo supports YouTube and Dailymotion to download videos in formats including mp4, flv and 3gp.