Having kind if a similar setup, I am using the Blue Iris integration available through HACS:
https://github.com/elad-bar/ha-blueiris

I also followed the instructions to have BlueIris publish MQTT-topics when motion is detected or connectivity changes:
https://github.com/elad-bar/ha-blueiris ... -server.md

I'm afraid the post before yours was from a spammer and has been deleted. Your post looks very useful even without the original question, so can be retained