There is a recording to go with this sequence, which you can hear by clicking here (It is 49 seconds long, with a file size of 774KB).

The recording starts with a call from the male (outside), which prompts the female to head for the corner of the box to start her chattering call.

After about 15 seconds she is back in the nest cup, and the male enters 30 seconds into the recording. He leaves just over ten seconds later, and calls from outside a couple of times before the female leaves at the end of the recording.