If it’s trying to figure out if you’re watching Stranger Things it can look for when your stationary at home and just needs to record a few seconds at a time every few minutes. I don’t know how the fingerprinting works. It might be able to run locally and not use a ton of power. We’re talking Shazam, not full text transcription.

Her husband’s name is Hunter

Sounds like that’s exactly what they’re trying to do.