Amazing that you've been able to get this attention! Just keep building, it will never be perfect or scale easily to begin with. Just keep improving and I'm sure users will keep coming back.
I added support for the new video types in nostr:nprofile1qqsdr0fnxvmn8hxyz8cwazfm8zu9yt7qmc38ll69nkvsgn8dnej4sxckxm0xe
ProofMode is the next feature, which looks very interesting.
I have plenty of experience building cloud scale solutions, I might be able to contribute some on architecture and code, if there is issues on GitHub written for tasks, etc?