I use this clamp to mount a Gopro into the bed of my 3D printer. I have a Cetus3D but I believe it will work well in many other 3D printers (and with other cameras).

A timelapse video using the clamp: https://youtu.be/Vy3xy-Z2EsY

I needed a clamp for making time lapse videos from my printings. I used the one that comes into the great Modular Mounting System https://www.thingiverse.com/thing:2194278 but it was too tall and obstructed the view of the printer bed. I then modified this simpler clamp https://www.thingiverse.com/thing:1673030 and made it as small as possible for this specific use, while preserving its strength. I also added the Gropro connecting system (from one of the pieces of the Modular Mounting System).

The whole setup uses the Axis Change Connector and the Arm_v3_60 from the Modular Mounting System, and this Gopro mounting case https://www.thingiverse.com/thing:941237 (I had to reduce its dimensions slightly so the camera will be more tight and won't shake too much).

FUSION 360 model: https://a360.co/2wOgNQp (thanks https://www.thingiverse.com/CherHubert/about for the suggestion)