Put it in an emulator, record what it is trying to do, is it trying to reach a site or transfer large amounts of data? Even if you can’t read it right away (there are tricks for that), you would notice video/audio being fed back to a third party system.
Generally, recording audio/video is of little interest to a company, there is no way to keep track of it all or index it for anything useful. What is useful is figuring out your patterns of location, purchase etc. Not to the JW but to the ad companies.
If you’ve ever been involved with or done surveillance on people, you’d find out that going through hours of audio/video is annoyingly boring. Active surveillance is probably the most boring job ever, people aren’t all that interesting, they don’t talk about anything interesting. Even elder meetings and judicial meetings are utterly boring, a synopsis can be made in 3 sentences or paragraphs, most meetings anywhere in the world are just housekeeping and going around following corporate rules.
DMCA does not apply to reverse engineering and commentary, feel free to do it and post the code on GitHub, as long as you don’t include the binary, it should be fine.