If your cable provider is Comcast I would check your speed more than once when the buffering is occurring. They advertise 50 mbps but between the hours of 8-11 pm speeds vary widely due to Comcast's lack of capacity. My speed can vary from 55 mbps during the day to .5 mbps at night. I can run 3 speed tests in a row and get 15 mbps, 8 mbps & 1 mbps within a short period of time on any given evening. This happens at my home in Indiana and the condo on Sanibel 1100 miles away. Comcast is falsely advertising their speed and getting away with it.