Generic Camera behaviour while App closed

Hello,
I want to add several cameras into my HA but first I would like to know how this component really works.
Basically, I would like to know if HA is pulling frames even if the App (Dashboard) is closed. And what about having the App Open but not the View that contains the Generic Camera component?

Why I want to know this? Because my cameras works with GSM/4G (Mobile SIM) and if HA pulls images 24x7 it will consume all the data from my Mobile Plan.

Thanks!

There is an option to preload cameras in background without any watchers, this will speed up initial loading process.

If preloading is disabled, it will start streaming when someone starts watching it and will stay alive for a period of time even after all watchers are disconnected. Not sure about exact duration though

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