Greasy Fork is available in English.
(Be Tested Daily) Bypass all youtube ads (skippable and non-skippable Ads) plus download youtube video on the fly
< Feedback on Youtube Ad Cleaner(Include Non-Skippable Ads- works)
https://www.reddit.com/r/youtube/comments/17079px/comment/k5gtgff/?utmsource=share&utmmedium=web2x&context=3
Didn't work for me until I cleared site data for YouTube.com.