The same 25fps judder issue is present for me on the Sky Sports Football and Sky Sports Main Event channels using a Roku Streaming Stick+ and a NowTV Smart Stick. The Sky Sports Premier League channel is currently fine and is a 1080p 50fps stream.
I have complained about this and requested a refund for my Boost pass. It is unacceptable to charge for a Boost pass which for Sports Pass customers is supposed to give 1080p 50fps streams on all channels. The England v Denmark game last night was clearly broadcast in a low quality 25fps stream on these channels whilst the Scotland game on the Sky Sports Premier League channel was fine.
Just noticed you are using an LG OLED TV.
Have you tried turning the Trumotion settings off in the LG picture menu settings with the HDMI port connected to your PS4 with the NowTV Boost Pass.
NowTV mentions this in one of the Help articles if you see motion artefacts with fast moving objects.
If you’re watching a thrilling NOW TV action movie, live sports or other show where objects are moving at breakneck speed, you may notice the objects being duplicated – affecting your picture quality.
This may occur with the latest LG models, due to TruMotion technology. Usually, it reduces blur and makes images crisper. We recommend turning it off when watching NOW TV, as it can occasionally result in duplicated objects.
To turn TruMotion off:
Still on going reading the red service banner on the top of the NowTV Help Section screen.
I don't use a PS4 so wouldn't have a clue if you can bring up some information on screen, but to my eyes i can tell straight away if sports is not playing at 50fps and don't need any information seen on screen to inform me otherwise.
Do you have a PS4 and if so let your eyes be the judge if you are happy with the NowTV 50fps playback on the current six Sky Sports channels with the NowTV supported devices.
Some people are more prone to seeing judder and motion artefacts than others.
I have a DLP Projector and i have no problems watching it, but some people see the rainbow effect and can't watch the picture.
Something similar with Plasma TV's and flicker, some people see it and some people don't.
Just read up on your previous posts and it seems the PS4 with the NowTV Boost pass doesn't look smooth to you.
Maybe another LG OLED TV owner can assist with their picture motion settings when watching NowTV Sports when connected to a PS4.
Like i said i don't own a PS4, but see if there is an option for 50hz rather than 60hz in the PS4 picture settings.
Or perhaps the Sky Satellite Sports service might be the way to go if you can afford it if you can't get used to the NowTV Sports Boost Pass picture on your PS4.
Have you got another TV in the house apart from the OLED to see if the judder and motion artefacts persists ?
My two old Plasma TV's when it comes to motion blows my two mid range LCD 4K TV's out of the water when using the NowTV Boost Pass for Sports.