It doesn't matter how much bandwidth you have to your service provider when it comes to streaming. It matters on how much bandwidth there is between your service provider and Netflix. Some providers like Verizon, pay for dedicated bandwidth to Netflix for example.
This assumes that your motion problem is with the stream from Netflix and not internally with the TV.
Sony 55A1E, A9F / LG 55OLEDC8
Marantz 7012, Ohm Walsh Speakers
Klein K10-A, Jeti 1501, Murideo Six-G
Calman Ultimate, ISF Level III Certified