I guess you should start with genres that other You Tubers tend to overlook. But has enough appeal.
Because if you pick a popular (but crowded) genre, you would be competing with already established channels.
So try a niche genre.
The school festival arc is getting fun with everyone finding a role to suit them for the concert (band, dancers, fx). Bakugo as drummer comes as no surprise ) And for a more comical villain Gentle & La Brava are perfect (equal parts Youtuber, gentleman thief & stage magician). We even got a bit of mentoring between Allmight & Deku.