I watch Netflix through various sources, mostly through my ATV4, hooked to a Vizio M601. Recently, I began watching the show The Fall, which is a BBC show. I noticed the motion was very jerky at times. I also noticed this on another BBC show (I cannot remember which one). These shows are the only shows I've noticed this happening. Last night, I watched Netflix through the Vizio's own TV app. I did not see the jerkiness at all. I checked the Vizio settings for both the Vizio App and the ATV input. Although the color and brightness settings are different, both have "Reduce Judder" set to "off", which is the setting I thought would most impact an issue like this. I suspect this has something to do with the shows being BBC shows, but I don't get why the jerkiness shows up through the ATV but not through the TV App. Any ideas?