I wouldn’t worry about it too much. You can get some without WiFi. You just have to yank the microsd if you want to see the files. The one I have has WiFi but it’s so slow I can’t even preview videos. I have to connect to its WiFi, so unless it’s randomly connecting to open WiFi’s while I’m driving without my knowledge, I can’t see how it would transit much.

Don’t spend too much though. They break after a couple years. Especially if you live in a hot climate like a desert.