The best I got is to click on the three dots (at the bottom right of the video on the home page, or the top right on any other video), then select "Don't Recommend Channel" or "Not Interested". You're basically directly telling the algorithm to not show you those kinds of videos. They may still show up though, you might have to do it multiple times for it to get the idea. Also, you can't click on any Elden Ring related videos, or it'll start recommending you them again.