The short but to the point footage shows what will be slow motion clips produced with the new OnePlus 6 handset. You can see that a lot of care has been taken to shoot professional looking footage that will showcase the high frame rate capabilities. We are not sure if the resolution aliasing we are seeing is from the phone quality or the video compression.
Considering Sony and Samsung have similar artifacts OnePlus will look good on smaller screens but not ideal blown up on a monitor or TV. Professional lighting is no substitute to real line resolution for footage. We should know more as May 16th launch date approaches and we will be gladly surprised if the phone is capable of higher resolution slow motion recording than the competition with better recording time which has been the Achilles heel for these slow-motion phone features. 0.2 and 0.1 seconds is just not long enough for having a usable span of time.