Adobe Premier CC 2019 Rendering Problem

If my ancient eyes don't betray me, looks like interlacing issues.  first tell us where your source video comes from.  Old school broadcast video in the united states was 29.97 frames per second (in europe it was 25 fps).   Each frame consisted of 2 fields... each of horizontal lines that needed to be combined to make 1 frame.  Because there was a temporal difference when each field was recorded, if you combine them improperly you get what I'm guessing you're seeing.  I'm getting exhausted just trying to explain this.  Do some googling, look stuff up on wikipedia.  and if you still can't figure it out, post back and I'll try and explain it for the 40,000th time.   Don't mean to be snarky, (well a little) but it's complicated and I spent a great deal of time learning all about it cause I had to back in the day.   Just be thankful in this day and age, most video is progressive, that is each frame is complete in itself.   

In terms of figuring out how to fix the problem, do some googling on "deinterlacing."  Complicated and not simple and no single solution works in all cases...