You mean the large file upload? Both. I have a blossom server that implements chunked uploads and I client that works with it.

GitHub

BUD-10 multi-part uploads by hzrd149 · Pull Request #67 · hzrd149/blossom

This BUD adds a PATCH /upload endpoint to allow clients to upload blobs in multiple chunks Readable version

I've made this streaming video system where the backend is a blossom server. I have a script which splits the video up into "segments" (I'm using HLS for adaptive bandwidth) to allow easy-ish uploads of video It requires cashu payments, but in reality this is free as I'm using a test mint which gives tokens for free. So this is easy to use now. Feedback appreciated! And I'll read the link you sent https://cashutube.satsandsports.cash/