How to avoid “media could not be loaded” in the browser?

It is H.265 compressed without sound.
Screenshot_20201223_173129

I am using this bash script to compress a image sequence:
#!/bin/bash
timestamp=$(date +%s)
ffmpeg -framerate 25 -pattern_type glob -i ‘ana_*.png’ -vcodec libx265 video-$timestamp.mp4

Tryed to upload a H264 video today. But run problems with login: