Show HN: Made a free app for editing bjj rolls into viral TikTok clips (kimura-cuts.web.app)

What are BJJ rolls?

I'm guessing you're talking about rolling with a sparring partner in Brazilian Jiu-Jitsu. That is a very niche target audience-- I would wager most people are going to be unfamiliar with that phrase. Why not open it up to ...well, anything?