Because they are visual mediums, tv and movies of necessity have ‘action’ taking place. Would you enjoy a movie where two people simply sat or stood and talked excessively about the details of the story? No, of course not. You want to see it ‘acted out’. People tend to do things while they are talking. In the movie Field of Dreams the lead character, Ray, is talking with his wife, Annie, in their kitchen. The scene would have been rather dull if they simply stood or sat holding the conversation, but instead, Ray is getting himself a glass of water, and Annie is getting things out of the refrigerator, preparing food and putting things in the oven as they talk. The scene moves, and it feels completely natural because that is how people behave in ‘real life’.
Similarly, we need movement in our stories. Don’t simply have two people talking at one another (at least not all the time). Depending on the setting, maybe one of them is grooming a horse while the other hangs over the stall door, occasionally handing them grooming tools. A woman could be knitting while she is talking with a friend. In more modern settings, in a group of people sitting around, there is usually at least one of them playing with their cell phone or checking emails. Have the characters move and ‘act naturally’ in whatever setting they exist. That will bring them to life more, and help the reader envision the scene. If they just talk, I can’t ‘see’ what they are doing or what is happening around them (others moving in the background or crossing the sidewalk in front of them).
Bring your story alive with movement.