This device holds a Raspberry camera attached to the bed at a safe distance from the head and allows to monitor your prints and make timelapses, for instance using Octoprint.

Just clip it underneath the hotbed.

I printed this with 0.2mm layers because I was in a hurry but I recommend 0.15mm.

Use PETG, since it's in contact with the underside of the hotbed, PLA would really get soft. PETG is okayish when printing PLA (not when printing PETG!), ABS would probably be better.

Here is an example of the result: