I wish there were a standalone camera you could do that with.
If you have an Apple device and have ICloud, your photos are immediately transferred back to your home computer and stored there. So you still have the images even if they destroy your device. I believe this is true of vids as well but it could be very data-expensive if so.
I think what you would need, to do that with standalone cameras is:
* a wireless capable, IP-enabled camera (common with modern security cameras designed to connect to a DVR system)
* an cellular internet connection in your vehicle - either through a phone, or through a portable computer with a cellular internet connection.
* a wireless router to set up a network so your IP cameras can connect to the internet through your cellular internet connection
* a cloud service account to store the transmitted video
That’s a lot of rigamarole to set up in a vehicle, especially if you want it to be inconspicuous. Seems there is a vacant niche in the market for some entrepreneur to consolidate that into a single system.