This is my story. I had the same issue like the OP.
I worked for a year to get rif of the "stutter": Technical term is JUDDER.
- I upgraded my powerful Win 10 machine with an upscale Nvidia card.
- I tried all kinds of panning speeds, different frame rates.
- I tried all kinds of editing tricks and delivery formats in Davinci Resolve.
- I tried 4 different video players: VLC in all kinds of configurations, WMP, MPC-HC x64, Windows native player.
Nothing helped. I got nuts!
Early January it was time to replace my 10 year old TV and I bought the latest Samsung QLED 8k.
I have this 512GB SSD USB Stick (15x faster than regular 3.0 USB Sticks), put my videos on it and plugged it into the TV (which only has USB 2.0!)
Everything is smooth as butter! I couldn't believe it!
No judder! There never was any!
Of course it has nothing to do with the TV resolution - it is that feature called AUTO MOTION PLUS.
If I deactivate it I have judder.
Other manufacturers have similar technology under different names.
I said: WTF!
Why can't an upscale Windows machine handle this. Why is there nothing like Auto Motion Plus for PC or Mac?
The SMOOTH VIDEO PROJECT has a workaround but it's not ideal I find:
SVP – SmoothVideo Project – Real Time Video Frame Rate Conversion
Why can't Microsoft do what Samsung or Panasonic or LG and others can do??