It would be cool in general if recommendation algorithms or search algorithms were more customizable. I would imagine you could put some code into your settings that controls which recommendations you see. The platform, like YouTube in this case, could compute features that enable different kind of recommendation algorithms. There could be communities of people who tinker with this and share their recommendation algorithms.

Steam added this feature recently (https://store.steampowered.com/recommender/ lets you add weights for "niche/popular" and "older/newer") and I've never had so much fun browsing a store. I hope other platforms take note