"Black screen" video playing on Slack
Dear Firefox community, I faced an issue today. I uploaded a video to a Slack forum thread, it is embededd , I can see the videos' "screen" but when I press play, i got only a black screen with audio. I've already checked the forums considering this issue, in any case disabling hardware accelaration and disabling extension were advised, I tried this disabling these, but nothing happened.
What can be done, or will it be fixed by an update?
Thanks in advance, Yours sincerely, Ádám