Anime-editing is a long-popular niche; though it started years ago, it's still hot today. Healing-style videos especially almost always blow up. Yet secondary creation is quite time-consuming – it takes heavy hours and may still not meet the original bar.
Now it's the AI era, and we can make original content with new thinking. E.g., tell office-worker life stories starring bears, cats, and fun animal characters. I've made a demo video – take a look. This style is fully original, and the unique idea makes you the benchmark others copy, not a follower. Use this idea to lay out your position fast!