worked for a company doing apps for smartTVs. They all do it. Incessently. I made ad games that would pop up when the system recognized a certain ad was playing. you were supposed to be able to opt out of this but LG got busted in the UK for not listening to that option. This was back in 2013 era. It's worse by now I'm sure. They'd straight up send a screencap of whatever was on your screen every second for content recognition. Terrible shit.
https://www.bbc.com/news/technology-25018225