We've streamed our service for a handful of years using a video camera connected to a Blackmagic interface that converts HDMI to Thunderbolt (Mac).  We grab the audio from our sound system and run it through a second board that has USB out for sound.  Then we use Wirecast for the video management and streaming.  We are considering moving from the old MacBook to a new, high powered Windows PC and using OBS and ProPresenter for our services. I get asked a lot of questions but I'm really out of the loop!