Uses magnets to hang off the bottom of the printer and a copper tube to hold the webcam at the desired height.
Designed for this (https://www.amazon.com/CYLO-Metallic-720p-Webcam-Black/dp/B09H5B9G1P) webcam, feel free to remix upper mount for other models. The lower mount was also dimensioned specifically to make sure it wouldn't interfere with my Sidewinder X2 with a removable PEI sheet, so it may be a bit larger or smaller than necessary for other models.
Requires 5 6x2mm circular magnets (superglued in) and a length (I used one foot) of ¼" copper tubing. I got a one foot section from Lowe's for about $4 US. May need some tape or something around the bottom of the tube to ensure a good fit, but the top section worked almost perfectly for me. The upper mount also has a hole for an M3 screw should it need to be tightened.
The author hasn't provided the model origin yet.