Downloading Videos from youtube in Linux

Most video downloaders available do not have a Linux version. If you are using Linux and you have a favorite video in youtube and want to download it to your local computer for future viewing, you may be stuck on this.
However theres a pretty simple way in which you can download these movies just by a click of a button.
For this example i am using Kali Linux a Debian Linux and Iceweasal which is the default browser, alternatively its a Mozilla Firefox version of Kali.
Theres no need for an application to be installed into the system for this to happen. All you need is a addon to be installed and intergrated with the browser.
The addon can be downloaded at https://addons.mozilla.org/en-US/firefox/addon/video-downloadhelper/ Once downloaded it prompts you to install into the browser. After installation you have to restart the browser for the effects to take place.
The addon works by detecting a video  in a webpage then it becomes activated

The addon is automatically added nest to the video title. To download the video click the arrow then in the list choose download, or quick download. the video will be automatically added in the ongoing downloads. This addon also provides the option to convert the video as it downloads so you can convert your video to supported format of your video or audio player.