When playing video-file in ScreenShare can participants choose to see my video-file only, no faces?

Hello Rupert,
Thanks for taking time to reply – much appreciated. Since I posted my discussion topic I have been exploring view menu options. It may be of interest to some others to hear what I 've discovered so far, about what participants can do to change their view of the Host's screen-share while his/her video file is playing.

While his/ her video is playing:
1. In the view menu, top right, choose standard and full screen.
2. To the right of the green banner at the top of the screen there is a black and white banner called View Options.
From the drop-down in View Options choose so that : Zoom Ratio will Fit to Window.
From the same drop down menu choose on Hide Video Panel

In a test meeting with my brother as Host and me as Participant, this sequence enabled me to view the video he was playing, without  seeing our faces on-screen at the same time .

I was using a desk-top computer. I don't know how the sequence would work on an iPad or Phone.
I hope this helps somebody.
Best wishes
PeadarMangan21