Greasy Fork is available in English.
Add speed buttons to any HTML5 <video> element. Comes with a loader for YouTube and Vimeo
< Spätná väzba na Video Speed Buttons
for youtube users, you can try https://greasyfork.org/scripts/475864
Aby ste mohli pridať odpoveď, prihláste sa.
for youtube users, you can try https://greasyfork.org/scripts/475864