I haven't tried to train the chickens, but a few definitely know their names, and seem to understand commands a little. It may be more the tone of my voice, but when I point, they seem to get it. I can point in the run, and they will return to the run. Or if I see something that may be of interest to them, I point at it and they always look to see where and what I am pointing at.
And there are others who are oblivious. The one chicken that I spend the most time with, I bring her in the house, carry her all over the yard, etc, will NEVER even look if I call her name. Poor Ginger, she's adorable but maybe not too bright. And others come running at their names.
To the OP, I think your filght project is a really neat idea. Where is this video of Eduardo? I would like to see it.