ok. i updated peertube to 6.1 using the update scripts, and as part of that also ran your nginx configuraiton update script:
cd /var/www/peertube/versions
diff -u "$(ls -t | head -2 | tail -1)/support/nginx/peertube" "$(ls -t | head -1)/support/nginx/peertube"
the behavior persists. 140 mb files exhibit the same behavior. goes to about 8% and grinds to a halt. after about 5-10 minute the upload seems to finish, but at the very end the upload bar turns red with « Your video file was too large »
p.s. sometimes spamming the « retry » button seems to eventually succeed. but for some it doesn’t.