Honestly, I think your dog’s behavior and reactions would be highly individualized. In other words, you would probably need to do some exposure and experimentation to find materials that are “just right” for him. Having said that, if he’s calm watching dramas, then couldn’t you just stick to dramas? Also, if you play the same specific materials often enough, even ones he reacts to, you may find that he becomes less reactive to it over time. But again, it’s hard to say as each dog is going to be different.

Decades ago, when most TV watching was on CRT, I heard stories of different cats and dogs “watching” TV but I personally never witnessed it. Basically, it seemed like the animals had performance anxiety and would not watch TV if anybody except the owner was around. So, honestly, I was always a little suspect. Not to say that I believe no dog ever watched CRT TV, just that it probably wasn’t as common as claimed.

However, with modern LED and LCD TVs with higher refresh rates, it’s much more plausible and in fact, I have witnessed it several times. Not just a fleeting reaction to one thing on the screen or maybe the sound of another animal playing through the speakers, either. It’s more like the dog is somewhat actively engaged with the on screen action, rotating ears and their head, things like that.