At this point I don't think there's a single channel I watch that produces original content for YouTube (as opposed to, say, speedruns of video games or stream

At this point I don't think there's a single channel I watch that produces original content for YouTube (as opposed to, say, speedruns of video games or stream recordings) that is not sponsored. The last few holdouts gave in just a year or two ago. Just like podcasts, they'll do an ad read before, in the middle of, or after the video. I've gotten very used to skipping them.