Nusiance about video on fediverse systems would be in deduplication and distribution. Central sites like youtube can take a hash of any given video and if it matches one already just link to that file. I’m pretty sure the same exists on systems like minio or using an S3 bucket per instance, but to link videos across a federation would either need to replicate the file and serve it P2P style, or hosts with a parculularly populat video are goin to get their bandwidth hammered.