This addon works well. You can choose exactly what you want to skip, and they recently added the ability to whitelist channels. There is no reason not to add this if you use YouTube.

great, i love it
wish apple allowed add ons so i could use it on my ipad

Sweet to no longer have to endure a 2 minute ad in the middle of a 6 - 7 minute video, almost always about something I could care less about and would never need, use, or want.
If you watch a video when before anyone else has marked the ad, it is easy to mark the offending ad, and I enjoy knowing it will then skip the ad for future viewers.

To the developer: I love you I love you I love you I love you. You are my hero.
I always skip sponsorship ads within a video. I'm happy my fav youtubers are getting money and I appreciate especially when they bookmark the ad in some way to make it easier to skip over manually, but this app makes that instant, and every time it skips something I am SO pleased.

Suddenly, advertisements began apper, which I had long forgotten about, apparently YouTube had created a countermeasure. Fix please)

does absolutely nothing for greece

Actually amazing. I don't want raidnordfreshetc. and never will.

Last night every YouTube video I opened started to freak out and the SponsorBlock UI was 500% larger. Then this extension uninstalled mysteriously. Is YouTube evolving?