Apple does not offer a video for such topics.
Home automation starts on Apple's side from a Home Pod for the most part and for the most accessibility.
It then relies on compatible smart devices that can be added to a scene to be controlled through voice commands.
So if you have say a smart Thermostat you can ask Siri to rais or lower the temperature.
If you have smart lightbulbs, you can ask Siri to turn on a specific room.
But if you want to do multiple actions at once you can use Apple's Home App scenes which let's you add multiple devices to a single command so you can set up everything for a specific event. Like if you want to set up a room to go to sleep, you can set up a scene that controls, the lights, temperature, the front foor lock and the window blinds so when you say something like "Siri, set bedroom for sleep". It can simultanously dim the lights, set a temperature, lower the blinds and lock the front door all in with one command.
click here ➜ Create scenes and automations with the Home app - Apple Support
See this video for more info: https://www.youtube.com/watch?v=t_b4-Ca7rWc&t=158s
