After reviewing more footage from March 20th, it appears that there was a second egg. The female appears to be eating an egg at 7 am and then again at 4:34 pm. It appears that both eggs have been lost. Footage captured at about 6:22am showed that both eagles were at the nest and extremely agitated, apparently responding to something directly above them. At this point the female leapt to her feet, without her usual caution - it's likely that this event resulted in the eggs being broken.