YouTube is a good place to find and enjoy those video clips.
However online web version of youtube playlist manager gives less intuitive access to video lists. It doesn't even provide sorting option and reordering of the playlist is cryptic. Specially for those multiple sub-divided videos ordering of the file is important.
Also for those people has limited speed of internet connection or trying to watch youtube videos on mobile phone has to experience lots of buffering during video watching. So, offline access to the video file is very useful.
Here we start to make a simple tools based on various Java technology that can modify and youtube playlist in intuitive way and download those file for later.