A wrapper that speeds up youtube-dl downloads by utilising aria2's capability of opening multiple connections per server. This uses a lot of bandwidth so be careful.
Please refer the following post for initial setup http://ankitshah009.blogspot.in/2015/04/download-youtube-videos-faster-in-linux.html
- youtube-dl (http://rg3.github.io/youtube-dl/)
- aria2 (http://aria2.sourceforge.net/) Installation of both these utility is pretty standard. Google to find out the installation
The below will work if youtube-dl is correctly setup
bash youtube-dl-with-aria.sh URL