This is a Sam’s Club model. We bought one new from Sam’s Club a few weeks ago.
Look up the word “judder”. It is a kind of a twitch/jump. This TV has it, especially when watching DVDs and TiVo. It apparently has to due with Frame rate.
I am Guessing Sam’s Club had a lot of returns due to it. We kept it Because it has a great picture (once you get it adjusted).
Three calls to Samsung and discussion with Samsung rep at BestBuy tells me there is no cure.
We even replaced our old DVD player with a new Samsung Ultra 4K BluRay player. New BluRays do better.