Go through the Mix inputs

I hit the issue that the OP did, and between setting up for single operator and under the time constraint to get it done and ready for demo to different people (relatively fast interchangeability is a plus of virtual sets), I just decided to make more than one set and have my stream to indicate in orange 'not' to change multiview inputs when a given set is live.

That way the setup is done in advance. You can cycle sets while live, with varying transitions, and still replace set components off-air if necessary.

Just curious, how have you set up the external output as a confidence monitor? I'm running on a [not insignificantly sped'd] laptop and already offload things to another PC to avoid extra CPU load brought on by external monitors. I've not quite reached the need, but an HDMI splitter on an already in-use fullscreen output is something I've considered.

I'm rather SDI limited, but ultimately the extra overhead and ambiguity, multiple-output wise, on what can be done with limitations on some of the versions I'm looking at has me balancing load and version options.

What does seem to give me what I need is NDI PGM out to double recording+streaming on a desktop and feed Zoom or the like locally. I've only tried fullscreen and not external out, but it seems stable so far with NDI input plus many others.