I was able to film Mom feeding this chick.
A bit later I filmed what I took to be Mom approach the nest as if to feed but on reviewing the video I saw that it was a male - note the purple throat - possibly Dad. Maybe he was urging Junior to jump, but instead the chick cowered very low into the nest. Then at noon I saw the nest was empty. I heard a hummer buzzing around in a nearby tree - and filmed what I believe to be Mom preening herself. She then went higher into the branches but I could not see if she was feeding her fledged chicks.