You should take a look at https://deniablevideo.com/ for any video you record. but for a fixed location like a home or office, since it's not a mobile device.

That 'deniable' part is a bit thin. Say, law enforcement finds this device at your home. Even if it is not plugged in, a case could be made that you have been videotaping. It would be more useful if this thing had a secondary function, say as a file server, and if it were priced like one (this box is US $5999.00 for 500GB)