I've heard if making money on YouTube is your top priority then it's all about the popular niches and posting shorter clips on TikTok as well to drive more people to your YouTube account. I had considered pouring time and energy into developing a travel channel at one point until I discovered what a grind it really is. The algorithms encourage more and more risky/extreme behavior too. I think this is why you see so many travel YouTubers traveling to more unsafe/obscure places and doing extreme activities like multi-day marathons and such. I still haven't given up on the idea but YouTube is flooded with travel channels now. You have one new subscriber now. : )