I've never owned a pet that gave a sh**t about what was on the TV. I've tried, but they don't care. Sometimes they'll glance at it if it's making clear, obvious and specific single animal noise, but they seem to get no visual stimulation from the screen. This is 7ish dogs and roughly the same number of cats.
I've had one cat (out of many cats and dogs) who watched regular TV; he'd lay right in front of the set and was clearly watching. He particularly liked basketball, baseball, and, oddly, Star Trek. However, he was deaf, so it's not too surprising that he'd be more visually stimulated than most cats.
We also once had a dog who would freak out whenever a doorbell rang on TV and run barking to our door, but she wasn't the sharpest knife in the drawer.