Old YouTube Bookmarklet

YouTube has removed the option to disable their new design, but the "old" design is still accessible. Below is a bookmarklet for restoring the YouTube design from 2016 and the other is for restoring new the Material YouTube design.

YouTube 2016 Design YouTube Material Design

Instructions

1. Drag the YouTube 2016 Design bookmarklet to your bookmarks bar.
2. Go to the YouTube homepage.
3. Click on the bookmarklet.
4. Optional Delete the bookmarklet.