I need to attend my yoga classes through meetings in the Zoom app using i11 bluetooth earphones. However, the earphones work perfectly for the Spotify and Youtube apps but in the Zoom app the sound does not come out of my earphones, but in the speakers of the Samsung tablet itself. How to solve this problem?

We host a bi-weekly training seminar with Zoom. The training requires:

• verbal participant interaction between the presenter and participants
• sharing of the presenter's screen
• continuous view of the presenter (uses a lot of expressions and hand gestures)
• spotlight between the presenter and one to three participants

The presenter is in Florida (and sometimes a second presenter is in Canada), the producer/director/tech support is in Missouri, and the participants are throughout North America. The primary presenter is not tech-savvy; therefore, everything has to be as simple as possible. 

I, the producer/director/tech support, have ecamm, ZoomISO, and Loopback on my M1 MacBook Pro. I'm unsure how I take the presenter's camera, audio, and screen share and pipe it through ecamm. I want to use an overlay and then present the output of ecamm to the participants, all while keeping the ability for everyone to communicate. I know how to pull the presenter camera and screen into ecamm using ZoomISO; what I do after that is what I'm unsure of. See attached for details and a visual representation. 

I'm not a complete noob, as I have a broadcast background learned during the analog-to-digital transition period. I've also helped take a church entirely online, designing and implementing a three-PTZ camera setup with two-way communication. What I'm trying to do here is a step above.  

Thank you for any help and guidance you can offer.