Diiz is a free web tool that will allow you to create playlist from youtube videos. It is very simple and easy to use anybody. No sign up is required for using diiz.
To create playlist simply paste URL of the videos in Diiz website and finally click “Create My Playlist “button then you will get a play list you can play song one bye one. It provide all the options in your music player i.e. pause, play, next, previous etc. you can create public and private playlist.