YouTube support the use of Keyboard shortcuts for it's embedded video player and this can save you a lot of time.
While watching a video YouTube, a simple press on a Keyboard key and an action is performed:
- Spacebar: Play/Pause
- Left arrow: Move back in the video (rewind by 10%)
- Right arrow: Move forward in the video (forward 10%)
- Up arrow: Increase volume
- Down arrow: Decrease volume