It's a chrome extension that lets you create your own youtube playlist and add and remove anytime from the playlist.
#Step 1: Download or clone the repository.Extract it to a destination of your choice.
#Step 2: Go to Extensions(more tools option) in your chrome browser and enable Developer mode.
#Step 3: Click on load unpacked extension and select the YoutubeFav folder with all contents. You can now disable your Developer mode.