I occasionally watch "let's play" videos as a harm reduced alternative to actually playing games. A half hour spent watching someone play a game/sim totally relieves my FOMO. It also dissipates my urge to build a gaming PC. As a maker and musician, there's tons of inspiring and informative content on YT. I feel that I'm quite net positive on my use of YT to enrich my life.
I don't quite see your logic here. How is it "harm-reduced"? Playing a game can be quite enriching and stimulating, whereas watching a video you're just sitting completely idle. To me, it sounds like you're just irrationally worried about playing a game for some reason.