NETWORK SPEED NOT FAST ENOUGH (Gigabit!) ... constantly freezes/skips

[nfmain]

I stumbled upon this thread:

Massive buffering - SOLVED

Had a Roku stick on my 1080 TV. A few months ago it started stuttering occasionally on any movie I played. No worries, my other Roku stick and my Roku 3 still worked on my other 1080 TVs. Replaced one 1080 TV and streaming stick with a Roku 4 and Vizio P65-C1 4k TV and no 1080p movie I play on it will play smoothly. For the most part I have h264 AAC MP4s. But even an old SD rip buffers happily and won’t play. I have the app settings all set to play using the original encoding. By default t…

where @ljunkie said to disable large file offload – I did, yet no fix.