Like so many things, especially technical..... it depends ;^)
First question to ask yourself, is how are you going to connect to the video output of the PTZ cameras?
my person preference for flexibility and future-proofing is NDI, but there is a cost to this choice
It appears some of the cameras support RTSP... I'm not sure how that compares in terms of video quality to NDI & other options
For me (I set it it up), using a single PC, dual monitor, it is a 1-person job
- understand ours is liturgically based, not evangelical, with choir/pipe organ, not band.. so different expectations around sound and lighting. Our sound setup is largely set and forget. *IF* you typically have someone constantly monitoring audio, and making adjustments, then expect that person to continue to be need, separate from livestream video operations
When we upgrade to a second PTZ camera, for our environment, I'm still expecting single person job to run livestream ...
In part, we have a complex setup now in OBS, as we don't have -in-person worship, and I am constantly going back-n-forth from live video feed to pre-recorded content (prelude, announcements, hymns, psalm, readings, postlude, etc)... my OBS scene list is almost 30.
Once we are back to in-person, indoor service (which I don't expect for many months), OBS operation gets MUCH simpler, and primary livestream operations duties becomes
- keeping Service Bulletin on right page (I'm using PowerPoint filling up ~1/3 of left side of screen)
- camera operations... I've already set up a lot of presets, I'm rarely manually control camera position outside of presets... depending on service style, this could vary. I've trained my priest (when we started with webcam) to largely stand in place. Once able to walk around, this will probably change
- keeping on an eye on livestream itself (audio levels, online comments (ie digital usher), bandwidth, video preview on streaming provider platform)
I'd say think about your worship presentation style.
If the camera is changing constantly, an operator has to manually to changing Proclaim, then maybe... for us, my PowerPoint, is 30 pages, and that includes opening slide which along with photo becomes video thumbnail, countdown page, then at ends thanks for joining, coffee hour on Zoom invite, copyright info, and more.. So not that many slide advances. During Sermon, only a single slide is presented) so PPTx and camera operations by single person is very doable
I like having this all on one PC. I've trained other volunteers, who are non-technical, who can do our more complex OBS setup now, and camera operations, etc with me watching over their shoulder. Things will get a little more complex when I take our physical sound panel/mixer, and take its digital (USB) input into streaming PC and get access to each channel individually
Final thought/consideration - I'm using software/keyboard camera control now. it is okay (and why I'm using presets). *IF* you want smooth clean camera PTZ motion, you are much more likely to get that with a physical (vs keyboard) controller... I'm too cheap, and we are getting by without... for now.. time will tell if we need to upgrade