Incredible time-saver, skips all the BS in the video automatically. You actually don't even notice how much time you save with this addon. It is invaluable.

I love the extension, it is a must-have to enjoy youtube.
However, it is very broken on mobile right now.
After installing, in fullscreen, the video flips to portrait mode every 20 seconds or so. (Sometimes by itself, sometimes as a reaction to the screen being tapped).
The only way to fix it is to go out of FS or double tap to skip 10 seconds of the video.
It is incredibly annoying and by rating one star my intentions are only for the dev to give the issue the appropriate amount of attention it deserves as I am not the only one who suffers from this problem.
There is an unresolved github thread about it and there are reviews here that mention the same issue.
As soon as it is fixed, I will five it the 5+ starts this amazing extension deserves.

It use to work great but since the last update it no longer auto skips ads. I cant even get it to manually skip segments that it claims are already in the database.

It's not working anymore on youtube.

YouTube is unwatchable without this add-on. Sponsored segments being shoved down your throat is insufferable and this removes all of that and more including useless sound segments in music videos.

If you ignore the snobby assholes who make nonsense, harmful segments towards small youtubers, it's not half bad.

On Firefox mobile, it breaks youtube player.
Can Skip video but freeze YouTube player.
Like pause button, 10s forward -rewind, seeker ber
Doesn't work