I've been sucked into a few. One which I actually subscribed to though was about mousetraps. Initially I had a mouse problem, so wanted to learn a bit about different traps and any other advice. I ended up stumbling upon a youtuber who does nothing except review different types of rodent traps and it's actually interesting! He talks about the engineering, the instincts of mice, compares humane ones to deadly one, keeps any mice he captures as pets, shows how to look after them, puts some traps or baits with cameras in the wild so there's great footage. He even reviews antique mousetraps, some of which are really bizarre in design, like one from the american civil war that utilizes gunpower!