Simple case for the esp32-cam module. The small micro usb breakout board is for external power.
The esp32 module is very hot when streaming video, PLA may not be adequate.
The ESP32-CAM-Front.stl and ESP32-CAM-FrontThicker.stl differs in the depth (+3mm for the later).
Two popular usb breakout exists, one is green, the other one is blue. Select the back corresponding to your usb breakout.