I don’t know if this applies to you, but don’t use the compression flag (-z) for files that already is compressed (like video). The transfer will get CPU bound quickly if you have a fast internet connection.
I went from 13 Mbytes/s to 200 by removing the -z flag, and the compression ratio was non-existant anyway.
JovialSodium@lemmy.sdf.org 5 months ago
I use rsync for this purpose and the only notable bottleneck is my download speed, fwiw.