Take video from each device and show only to moderator

I wanted to capture the video from each participants and shows video only to moderator.
i have hosted jitsi meet to aws e2 instance and already configured domain.

Basically it is just like a monitor system who will monitor all the participants.

Please also help, can i have 10 meetings in parallel with 50 participants in each on same ec2 instance(ubuntu)?

Can anyone comment on this?

I think a hack was posted for that here