Mission Impossible: LostStar and Director – Tom Cruise and Christopher McCurarie, respectively, who took a break on the set of Top Gun: Mavericks – Have a message for you: you want to know about your TV's motion smoothing, and that's bad.
Motor smoothing is a feature of newer TVs that interpolates frames and adds them to the content you are watching. What does that mean? Basically, the part of a movement that is not actually on-screen is created and added to a sequence; So if someone is running, normally you would see their feet walking from one place to another. With smoothing motion, you can see the whole process of one foot moving in front of the other, because the TV is using the two frames it has and creating something in between.
While this feature is good for things like sports, where continuous fluid movement is fine and the whole idea is to see people perform actions in real time, it's not so great for movies. Worse is that it comes through default on most television days.
That is what is going on and McCurary, as well as some other film makers, like Star Wars: The Last Jedi Director Ryan Johnson, Want to know how to turn it off.
Films are shot, for the most part, at 24 frames-per-second. When movies are made, and action scenes are created by choreographers or special effects, they are designed specifically to be played and seen at that framerate. A TV that launches a frames that are not really in the movie, depicting artifacting – blurry lines that appear as the TV tries to avoid things that need not be – or funny, high-speed movement, which crews and McCurarry refer to In their video as the "soap opera effect," give movies an unnatural look that is absolutely unintended.
Thankfully, this is a feature you can turn off your TV in order to get movies to see the way they should. And just like Chris and McQuarrie say in the video, a short search online should tell you how to fix the motion smoothing on your TV.