You may download the Youtube Downloader formt the below Link.Using this u can download all the Videos from Youtube.After u have downloaded kindly install it in your PC.
After installing the youtube,kindly open the software,and follows the below steps to convert the Video into the file supporting to mobiles like(Mp4,*.3gp,and etc)
1.Double click the Youtube Icon in the desktop
2.If you need to download the file,kindly provide the URL from the Youtube site of the Particular Video(Which will be provided in the Right side of the youtube site),and paste it in the youtube downloader software at the place "ENTER VIDEO URL"
3.If u have the file get at the bottom u will have an option "CONVERT VIDEO (PREVIOUSLY DOWNLOADED) FROM FILE"
4.Select the video file and then select the format in which u need and then provide the ok,u will be able to downlaod the file.
If u have any clarification kindly check and revert back
Thanks for using Fixya