Thanks to a post by Reddit user 'UnpreparedZerg,' setting up a webcam for your Neptune 4 is now a straightforward process. I'll be going over the steps from the original post, along with some pictures, just in case you're not familiar with the procedure.

I have tested a Logitech C310 and a random 1080p webcam from Amazon.

The file is only here because I have to upload a file to post this.

https://www.reddit.com/r/ElegooNeptune4/comments/15pjbef/webcams_and_neptune_4pro/

1.  First, download Putty, start it, and enter the IP address of your printer.
   
   
    
2. Login as 'mks' using the password 'makerbase'.
   
   
    
3. After that, enter the following commands:
   Type 'sudo systemctl enable webcamd' and press Enter.
   Enter the password 'Makerbase' again.
   Type 'sudo systemctl start webcamd' and press Enter.
   To exit the window, type 'exit'."
   
   
    
4.  Enter your printer's IP into your browser, navigate to settings, select 'Camera,' click on the default one, and enable it.
   
   
    
5. Restart your printer, and the connected webcam should now be operational.
   
   

I used parts of the design by @ukwebb_274915 and combined them with my own to mount the generic Amazon webcam.

https://www.printables.com/de/model/205333-ikea-stuva-cabinet-logitech-c270-camera-mount