Here I am trying to explain to you, how to download videos from YouTube using a Mozilla Firefox add-on named “ Easy YouTube Video Downloader”. First you have to install Mozilla Firefox web browser in your PC or Laptop. Then follow these steps.
1) Click on the following link. Click here
2) Click on the Add to Firefox button
3) It will start downloading the Easy YouTube Video Downloader add-on. After downloading you have to install that add-on. Then a pop-up window will come requesting you to restart Mozilla Firefox
4) Restart Mozilla Firefox.
5) Then go to a YouTube video page. Below each video window you will see a Download tab. Click on it and select the quality of the video you want to download. You are done!!!!!