youtube is a site that provides the world's largest video, youtube are many things to provide comfort to the user so it is very popular, users can load, watch, and share video clips for free.

Generally, the videos on YouTube are music clips (video clips), films, TV, and video made by the users themselves. Format used in YouTube videos are. Flv can be played in a web browser that has Flash Player plugin. youtube originally founded in February 2005 by three former PayPal employees, Chad Hurley, Steve Chen and Jawed Karim.
if you want to download videos from youtube
1. use internet download manager
IDM is a program that accelerates the process of downloading a file (download accellerator), but, at the latest versions, the videos can now be downloaded directly just by clicking it. Usually there is a tab that appears above the video that can be downloaded as shown below.
2. real player gold To download Youtube videos via computer, we can do immediately if you have Real Player Gold program. If we have a program on our computer, whenever there is a flash based video on any site, simply use the right click on the video which we will download and select "Download Video"
3. Easy YouTube Video Downloader If you use Firefox browser, please install the Easy YouTube Video Downloader plugin which makes Firefox the ability to download videos as easy as right-click it.