Interesting video.
I stand corrected. I drove pile all along the Gulf coast, from Brownsville to the tip of Florida, all around Kansas City and places in between. I have always known ground workers to be bucks and the top of the pile where the the hammer hit, and where the structure attaches to it as the butt. Often, piles, especially wood pile are deformed from the hammer hitting them. We had to cut those butts off square, and at the correct elevation. I suppose some terminology is different for different parts of the country. Thank you for the correction. You'll note that I stand by my remarks about that TV show, and the experience I have. An OSHA inspector would have shut them down before their first lift.