Hello everybody.
For some reasons we need to view and use our Confluence Cloud website via our "homemade" Chromium-based browser (Chromium version 109.1.110), which only supports free video codecs.
In Confluence Server our videos (VP9 codec) were displayed via the Multimedia macro and worked properly before migrating to Confluence Cloud.
After migration old videos still use Multimedia macro and work properly in all browsers, even ours.
Instead new videos, uploaded and viewed via the new macro "Images, Videos and Files", work on all browsers except ours.
So the problem seems to be due to a combination of codec and macro.
Does anyone have any suggestions on which codec to apply to new videos?