Technically, there are always steps in detail no matter it is a 10 bit video or 8 bit video, but it is easier to catch the steps in a video that is produced in 8 bit color depth.
55" 4K HDR TV shows it fine in powerdvd as other players:
The steps at upper part is less noticeable, and more noticeable at bottom part.
But, personally, I don't think there are any values to test this specific clip that oddly encoded 8 bit and 10 bit content into single one.
All the videos are already compressed and post-processing during the production phase, the file here is not exactly same as what the original image looks like at pixel level.
We use powerdvd to watch movies but not for scentific color research or testing purpose.
GPU driver affect the final color rendering results between different software player combinations as well.