I had another solution that used Ublock Origin Filters that seemed to break. Found this and it seems to work. No more accidentally clicking that needlessly large warning that fills a third of video thumbnails.

I was so tired of accidentally hitting this button. And every video from youtubers with more than 200k subs is sponsored, so it is useless. Really happy I can use this to remove it.

Seems to work

Amazing extension. Works exactly as it says.

It doesn't work. Installed, checked it was turned on, closed firefox, restarted computer. There is still a banner, not sure why this has 5 stars, don't waste your time until it is updated. Version 1.0.2

Does as it says

Does what it says. Removes the paid promotion thing from covering 20% of the video thumbnail (stupid ik)