Livestreaming a 5D mk3 (via ProPresenter)

Hi there

I working at a recital in a church I want to use my trusty 5D mk3 to provide a "video feed" back to the church's ProPresenter" software. https://renewedvision.com/propresenter/ (It's seems to be an accepted standard for many churches who are creating audiovisuals / live streaming etc.)

Any thoughts on how to set up the 5D to work as a "video camera" in this way please?

We want to video the musicians in say 4 minute segments AND simultaneously project them onto one of the church's wall mounted presentation screens via a projector.

I'm a little concerned that 5D might do some random "time outs" on me tbh, so if there is a way to avoid this too, I'm all ears!!

Many thanks in advance
Ed.