This mount can be used for hanging your webcam e.g. under a shelf. It rotates, so you can ajust the angle according to your needs. To secure the mount in place there are three holes you can screw into. The holes have a 4mm diameter. Probably you could also use double sided tape if you wanted to.

You can print this mount in one piece. The spacing is big enough so you dont need to print two parts. I printed my mount with a 0.6mm nozzle and 0.32mm layer height on a Creality CR-10S Pro V2.