Greasy Fork is available in English.
Adds keyboard shortcuts for controlling HTML5 media player (audio/video) with OSD support. Seek media to 0%, 5%, 10%, ..., or 95%. Rewind and fast fordward media by 30 seconds, 1 minute, and 5 minutes. Change media speed even beyond YouTube's speed limit. Change audio volume to 20%, 40%, 60%, 80%, or 100%. Change video aspect ratio for TV and letterbox content (for widescreen monitors).
Keyboard Shortcuts:
CTRL+, = Rewind media by 1/30th second
CTRL+. = Fast forward media by 1/30th second
CTRL+SHIFT+/ = Next frame (when paused; Firefox only)
SHIFT+LEFT = Rewind media by 30 seconds
SHIFT+RIGHT = Fast forward media by 30 seconds
CTRL+LEFT = Rewind media by 1 minute
CTRL+RIGHT = Fast forward media by 1 minute
CTRL+SHIFT+LEFT = Rewind media by 5 minutes
CTRL+SHIFT+RIGHT = Fast forward media by 5 minutes
CTRL+/ = Fast forward media by 1.5 minutes
0 to 9 = Seek media to 0%, 10%, 20%,...90%
SHIFT+0 to SHIFT+9 = Seek media to 5%, 15%, 25%,...95%
CTRL+1 to CTRL+5 = Change audio volume to 20%, 40%, 60$, 80%, 100%
CTRL+[ = Decrease media speed by 0.2x (by default)
CTRL+] = Increase media speed by 0.2x (by default)
CTRL+; = Reset media speed
CTRL+' = Change custom media speed
CTRL+\ = Change unit of media speed increment/decrement
For Widescreen Video Viewport:
CTRL+6 = Zoom ultra widescreen content to remove top+bottom borders, but also remove left+right content a bit.
CTRL+7 = Change video aspect ratio for letterbox content. Fix 4:3 letterbox content stretched to widescreen format.
CTRL+8 = Change video aspect ratio for TV content. Fix 4:3 TV content stretched to widescreen format.
For 4:3 TV Video Viewport:
CTRL+SHIFT+6 = Change video aspect ratio for ultra widescreen content. Fix ultra widescreen content compressed into 4:3 TV format.
CTRL+SHIFT+7 = Zoom 4:3 letterbox content to remove half of top+bottom borders, but also remove left+right content a little.
This can also be used to half-zoom ultra widescreen content on widescreen viewport. i.e. half-zoom of CTRL+6.
CTRL+SHIFT+8 = Change video aspect ratio for widescreen content. Fix widescreen content compressed into 4:3 TV format.
For Any Video Viewport:
CTRL+9 = Reset video aspect ratio
ALT+P = Toggle Picture-In-Picture / Video popout (Chrome/ium only. Use Ctrl+Shift+] for Firefox)
ALT+S = Take screenshot if current video frame (in its original siza and aspect ratio)
Notes:
Some shortcuts won't work on non US keyboards. Non US keyboard users will need to manually edit the keys in the script.
In YouTube, if the video speed is below 0.25x or above 2x, the YouTube setting display will be capped to 0.1x or 2x.
Web browser video speeds: Firefox = 0.25 to 5.0; Chrome = 0.1 to 16.0.