The idea is that you (or a friend ideally) have a private key on your computer at home, and your recorded video is encrypted with the public key so that if you lose your phone or it gets into the hands of an adversary, they can't decrypt the files. You won't have them either though, unlike the ACLU app.
I think the use case is more situations where you want video of something cool, but where the raw footage would put people in danger if it got into the wrong hands. Like blurring or cutting stuff out before you release it
This exists but doesn't do the streaming part: https://cryptocam.gitlab.io/
The idea is that you (or a friend ideally) have a private key on your computer at home, and your recorded video is encrypted with the public key so that if you lose your phone or it gets into the hands of an adversary, they can't decrypt the files. You won't have them either though, unlike the ACLU app.
I think the use case is more situations where you want video of something cool, but where the raw footage would put people in danger if it got into the wrong hands. Like blurring or cutting stuff out before you release it