This is so simple, wish I knew it earlier. Start a Video. Applies to long videos.
What you is YouTube Video Quick Review. There are no bookmarks in the Video itself nor is there a TOC in the description. What do you do?
Just type any number from 1 to 9. It is like saying go to 10% of the video timeline, 20% and so on till 90%. It does NOT work with keypad numbers. Only the number keys on top of the characters.
If you are midway somewhere, how do you restart the video? Press 0