Poor video quality-What are the best settings

[iflyai]

I've noticed that my videos have a horizontal line that moves from top to bottom. It's faint, but noticeable. Is there a setting that can eliminate this effect? I figured that having 4k video the quality would be much better. Please help!

 

[msinger]

Are you seeing prop shadows like this?

If not, please post a sample video so we can see what you're describing.