Assuming you have WiFi on your internal network (LAN).
I built a camera out of a Pi Zero:
https://amzn.to/31Bhp7Q
I didn't want to have lights on around my printer so I made sure that the camera had Night Vision capability (low light with IR illumination).
https://amzn.to/2XKmCtb
Then I used a DC-DC converter hooked to the 24VDC output of the printer to power it:
https://amzn.to/31BHYdl
The housing I printed was from Thingaverse
The Software on the Pi Zero
https://github.com/ccrisan/motioneyeos
You can then map the local IP address to your Duet for live view as well as save feeds directly to the PiZero or other network location.