An extension that lets you use keyboard shortcuts to control the playback speed of HTML5 audio and video elements.
Keyboard shortcuts:
Alt and + increases speed
Alt and - decreases speed
Alt and 0 resets speed temporarily
The speed is saved locally for each domain individually.
Visit https://www.youtube.com/html5 to make sure YouTube tries to use HTML5 video whenever possible.
谷歌浏览器、其他Chromium内核的浏览器
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