If you're willing to put an afternoon's work into it, you can easily and inexpensively build a home surveillance system with ZoneMinder that stores all data securely and safely on-prem. The cops can still take it, but it requires a few warrants to do so.

Shameless plug -> https://nbailey.ca/post/nvr/

But it's also important to only record what you absolutely must. I think putting CCTV cameras inside your house is insane, and putting up cameras in any "private" outdoor area should likewise be avoided. Once the data exists, somebody will want it eventually.