#PSA: If you are a #uBlockOrigin user, and you suddenly started getting ads on #YouTube, check out this Reddit post:
TL;DR: either purge the filter list cache or disable/re-enable the "Quick Fixes" list.
https://www.reddit.com/r/uBlockOrigin/comments/154vtwy/getting_ads_on_youtube/
In other news, I'm currently recovering from this mild heart attack of suddenly experiencing ads on YouTube for the first time in probably 10+ years. 😵