House Wren nest with both parents bringing food, including courtship feeding

This is the second day since the eggs in this House Wren nest hatched! The video starts with an empty nest, but it's not empty...there are three nestlings in there! Then at 0:32 we see one parent arriving with food in its bill. It feeds a nestling the food. Then later, at 2:20 we see the first bird arrive again with food in the bill, and feed the second bird. It's not clear if the food was then delivered to a nestling, but given the parent's behavior, we think the parent consumed the food. This is a common behavior during courting, but not so common during the nestling phase.
One more thing to note; there are three nestling that have hatched, while one egg remains unhatched. The parents can be seen on this video and on the livestream fussing over this egg, nudging it. It is unlikely to hatch, and we hope to capture the moment when a parent decides to remove it.