Movie not showing for students

[BobAnderson]

The piss poor customer support offered by Zoom notwithstanding, I would like to find a solution as to why a movie I show during a meeting (class) is not showing for students.  All they is a black screen.

I connect to the platform hosting the movie through a link sent to me by Social Dilemma. I have used the link to show this movie probably 20 times with no real issues. When I tried to show it recently, all student could see was a black screen and the closed captions. They could also hear the dialogue, but only a black screen was showing for them. 

Suggestions appreciated.