Is it Live, or is it HD?

Here is Charlie, our younger cat, watching the nature documentary Winged Migration, which features a lot of eye-croggling footage of birds on the wing. Our cats normally ignore the TV, but Charlie found the film irresistible. He sat in front of the set and watched it for at least twenty minutes. Of course during his excursions outside he sees a lot of birds, including sandhill cranes, snow geese,