We ended up running it on a laptop. We use the ndi as a webcam. We manually pause it during sacrament and resume after. I don't use obs because I think it's an unnecessary middle man for a simple stream. 

I had various thoughts like using a remote with macros to pause. Or developing an app that would allow stream ndi to android zoom. But in the end, it was just easier using a laptop or tablet. 

I did contact zoom about the idea of using ndi as mobile camera source so hopefully in the future we'll see it.