Okay, but has your dog actually been acting upset or were you just joking?
I had two dogs. One only reacted to sounds from the TV like howling or barking (or a doorbell!), the other one would actually watch and sometimes would bark at a "TV dog". The first one (my namesake Bandit) had bad eyesight, which probably explains why she only responded to sounds.
Yes. If a dog is on the TV, he'll walk up to the screen and wag his tail. If something bad happens to that dog, he'll whimper and then come lay in my lap.
He knows.
I've actually seen several dogs in my life that do this or something similar.