I don't think so

The Memory Case draws its power via the USB data cable, so it depends on your video surveillance system whether it also supplies power to the Intenso Memory Case in addition to data

Depends on the system

This depends on the video surveillance system, how high the resolution and compression is. Videos from live TV can be recorded and played back on the Sony TV. It certainly won't manage three streams in 4K.

I have no idea. I use it as a photo archive.