I'm not arguing for or against the police being able to subpoena video, I'm just questioning the real ownership value of storing the video on your own hardware vs cloud storage. It doesn't keep the police from subpoenaing and obtaining the video. It makes it a little easier to fight the subpoena since you can hold onto the video while it works its way through the courts, but that's an expensive process that I think few would undertake so it's more of a theoretical advantage rather than a practical one.
It doesn't keep the police from using it, it does keep some cloud company (and a possibly limitless network of 3rd parties, regardless of what is publicly known) from using it.
> that's an expensive process that I think few would undertake so it's more of a theoretical advantage rather than a practical one.
You don't actually need to hire a lawyer to fight a subpoena. It would be smart, but not necessary. And how expensive that fight is depends entirely on how far you want to take it.
If you're broke, you can still appear before the judge and argue your case. It only really gets expensive if the judge rules against you and you want to fight it in a higher court.