21youtube shortcut you never new existed

Here are 21 YouTube shortcuts you may not have known existed:

1. Play/Pause: Spacebar
2. Next video: Right arrow key
3. Previous video: Left arrow key
4. Volume up: Up arrow key
5. Volume down: Down arrow key
6. Mute/Unmute: M key
7. Full screen: F key
8. Exit full screen: Esc key
9. Seek to a specific time: Ctrl + Shift + > (or Cmd + Shift + > on a Mac) and then enter the time in the format HH:MM:SS
10. Loop a video: Ctrl + Shift + L (or Cmd + Shift + L on a Mac)
11. Repeat a video: Ctrl + Shift + R (or Cmd + Shift + R on a Mac)
12. Speed up a video: Ctrl + Shift + > (or Cmd + Shift + > on a Mac)
13. Slow down a video: Ctrl + Shift + < (or Cmd + Shift + < on a Mac)
14. Show/hide closed captions: Ctrl + Shift + C (or Cmd + Shift + C on a Mac)
15. Show/hide subtitles: Ctrl + Shift + S (or Cmd + Shift + S on a Mac)
16. Show/hide annotations: Ctrl + Shift + A (or Cmd + Shift + A on a Mac)
17. Show/hide end screens: Ctrl + Shift + E (or Cmd + Shift + E on a Mac)
18. Show/hide cards: Ctrl + Shift + C (or Cmd + Shift + C on a Mac)
19. Show/hide related videos: Ctrl + Shift + R (or Cmd + Shift + R on a Mac)
20. Show/hide suggested videos: Ctrl + Shift + S (or Cmd + Shift + S on a Mac)
21. Show/hide video recommendations: Ctrl + Shift + V (or Cmd + Shift + V on a Mac)

Note: These shortcuts may not work on all devices or browsers, and some may require you to enable keyboard shortcuts in your YouTube settings.