K then End, then K. Or scroll to end of Video and click repeat

As of 2020 you can still disable advertising in the middle of videos by scrolling to the end of the video and clicking on repeat.

You identify the presence of in-video advertising by yellow markers on timeline at the bottom of the video. Does not work for ads at the beginning and end of the video.

If Autoplay is enabled or video is part of the playlist, press Escape to cancel autoplay before repeating. If you are on a Smartphone, you can't disable autoplay. Instead - start the video briefly, stop it, go to your viewing history, play the video from there, scroll to the end, and repeat.

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Focus on Youtube Search Bar

Esc

Focus away from Search Bar

2x Alt+Tab

Focus on Video (focus away from Browser, then back)

Click on lower part of video (under the progress bar)

Focus on Video

K or Space or Click

Play/ Pause Video (K does not need focus on video)

J/L

Jump backwards/ forward 10 seconds (regardless of focus)

Arrow Left/Arrow Right

Jump backwards/ forward 5 seconds

1…9

Jump to 10% to 90% of the video

add #t=10m to URL

Jump to 10 minutes into video (press Alt+D, then End, then type #t=10m). Add seconds as necessary

Home or 0 (zero)

Jump to the start of the video

End

Jump to the end of the video (if video not in playlist)

, (comma)

Go backwards a little bit when video is paused

. (dot)

Go forward a little bit when video is paused

Page Down/Page Up

Jump backwards/ forward 1 minute (only when the progress bar is focused)

F or Double click

Full screen mode on/off

Esc

Leave full screen mode

M

Mute on/off

>/< (Shift+./Shift+,)

Increase/ decrease video speed in intervals 0.5 - 0.25 - normal - 1.25 - 1.5 - 2

C

Toggle Close Captioning

+/-

Increase / decrease CC font size (works in Chrome, not in Firefox)

B

Change CC Background color

Arrow Up/Arrow Down

Increase/ decrease volume by 5% (You must be focused on the video player, either by hitting Tab until you are focused or clicking on the video itself)

Right click

Open a menu

Move mouse or press otherwise unassigned key

show controls for a few seconds (in fullscreen mode show also the video's title)

Shift+P

Previous video in playlist

Shift+N or End

Next video in playlist

Num+0

Jump to beginning of Video

Num+2...9

Jump to 20%, 30% up to 90% of the Video