DynDNS? I’m not 100% sure what CF Tunnel does, but from my 2 min reading it seems that DynDNS would accomplish what OP described just as well.

Yes sorry I didn’t read your whole question very well. It may be possible to use the integrated remote app in the iPhone to control that. What device plays this video feed?

I mean you can basically make everything you can image work through stateless switches. You would use homebridge to attach some script to the switch and start from there. That’s how I control some of my stuff too. AFAIK homebridge and HA can co-exist.

You may wanna look at Kubernetes. It’s basically docker with failover.