Very interesting, Lou. I have added your embedded video to today's Blog post.
Your video illustrates the difficulty we have in interpreting eagle behavior, yet the value of observing it, and in this case, capturing it on video. The chick's behavior towards the adult reminds me of the way the nearly-fledged nestlings "greeted" a parent bringing food. They would rush the adult and barely allow time for it to drop the prey before making a hasty retreat.
Great capture!!