Can I have a streamed video as a "participant"? (windows pc)

Hello!   I have a video stream which I require to treat as a zoom participant.  I'm NOT talking about streaming a Zoom meeting, I'm talking about having one of the participants as an incoming  video stream.

I have half managed this by starting a zoom meeting (me as host on a windows pc); then going to the live Facebook video stream in a browser;  then rearranging the windows so that I can share partial screen which is the Facebook video in browser.  

Its a bit fidly and normal participants have to resize my shared partial screen so that they can see the other "people" participants.  Thanks.