Ha, that farm is not far from here. Brown Turkey and Black Genoa! Even though its a farm for commercial production, that should show you how lucky you are over there in America and Europe with all the best varieties widely available. Over here its slim pickings.
Yes, that is unusual that the farm is in pots. The trees are huge too. I wonder when the video was actually shot? It's a bit mixed up. If it was in June, the trees should be dormant. Could keeping them in the green house keep them growing all year?