Video goes black when sharing on Zoom

[colorado_bob]

I played a .MOV video and shared the window in a Zoom meeting:

• The original was in portait mode, and I cropped the video to an aspect ratio of 1:1
• I sized the window to show just the cropped 1:1 image
• I changed the view to "Minimal Interface"
• I shared screen in Zoom, selecting the VLC window
• I used the hotkey <space> to start the video
• I realized the video was not cued to the beginning, so I right-clicked to get the menue and clicked "|<< previous"
• The window automatically resized to a landscape aspect ration (which was undesirable)
• The video properly restarted at the beginning, but showed only a black screen - both in my local window and over Zoom. The sound was correct.

I know how to avoid this, but it seems like a bug worth addressing.

If I try the same sequence without sharing the screen, the window still resizes automatically, but the video is displayed properly.

This is with VLC 3.0.11 on Windows 7 (and Zoom 5.2.2).