Just so everyone is aware:
This is an ongoing arms race between YouTube and AdBlockers. YouTube is coming up with new ways to detect and screen out users with AdBlockers, while AdBlockers are coming up with new ways to circumvent detection.
This is happening on a daily, if not hourly basis.
I bring this up because whatever solution is working right now is likely to stop working soon, so be aware.
I hate to suggest going to this website, but there is a rotating pinned thread at the top of the uBlockOrigin subreddit with the most up to date instructions on the situation and how to block YouTube's ads.
Alternatively, if you're into longform videos, a downloader program like youtube-dl to grab the videos and watch them locally might be the best option.
