I installed the cameras and then packed the boxes with sawdust (click here for a description). This weekend, now that the boxes had been excavated, my wife and I focused the lenses and adjusted the camera angles, though based on the quality of the chickadee camera's video, we might need to do some more lens adjustments.
The photo above shows the chickadee nest box, camera, and the freshly excavated cavity filled with moss and squirrel fur. Based on the female's nest construction (see the video below), it looks like she will be laying eggs soon, then the real excitement begins.
Here is link a short video taken this evening of the female burrowing in to the nesting material to carefully create a pocket for the eggs.