YouTube Custom Playback Speed от Chris

Minimal extension that lets you watch YouTube videos at any speed you want.

Unlock full control of Youtube's playback speed. Youtube Custom Playback Speed removes speed limits from the playback speed menu.
- Click on the current speed in the playback speed menu to type in a custom speed.
- Use the keyboard shortcuts (< and >) or click on the +/- slider buttons in the menu without limits.
- Unlock 3x speed and beyond without a premium membership.

Features:
- Set custom YouTube playback speeds to any value from 0.0625x to 16x
- Keyboard shortcut support:
- Decrease speed: < (shift + ,)
- Increase speed: > (shift + .)
- Non-disruptive UI that integrates seamlessly with existing playback menu.
- Edit speed from the extension popup
- Edit speed directly in YouTube’s playback speed menu
- 3x speed without a premium membership
- Automatically remembers your speed settings
- Stores settings locally in Chrome
- No account, tracking, or external service required

YouTube Custom Playback Speed lets you type the exact speed you want instead of choosing only from YouTube’s preset options. Use the extension popup, or edit the playback speed directly from YouTube’s playback speed menu by clicking on the current speed and editing it.The playback speed setting is saved locally in Chrome and automatically applied when you watch other YouTube videos in the future.

This extension works by overriding the buttons in the Youtube UI to directly change the playbackRate attribute of Youtube videos. This allows us to disable the default speed limitations and utilize the full range of playback speeds available in the Chrome browser (0.0625x - 16x).

Privacy: This extension stores your playback speed setting locally in Chrome using extension storage. It does not collect, transmit, sell, or share personal data. No account is required, and no data is sent to an external server.

Source Code Available (AGPL), Free and Open Source Forever!
https://gitlab.com/chris_git_lab/youtube-custom-playback-speed-extension

Change Log:
v0.2.0
- Added more native-feeling functionality
- The + and - slider buttons can now be used to set arbitrary speeds
- Added support for keyboard shortcuts < and > to change speed.
- The 1, 1.25, 1.5, 1.75, 2, 3 buttons now work more consistently

v0.3.0
- Using shortcuts now shows visual feedback that displays the current speed
- This provides better feedback to the user and aligns the shortcut UX with the native youtube experience.

v0.4.0
- Minor misc improvements
- Firefox port