OnePlus has released the official OnePlus 6T slow motion 480fps promotional video with high production values. It is all shot with the phone and while you can see the jaggies and edge artifacts from resolution loss, it offers pretty compelling color and dynamic range for a phone. The 3.75 second rec time at 480fps turns out 1800frames or 30-sec playback at 30fps.
The OnePlus6 & 6T which offer essentially the same camera and high fps component are in the running for our slow-motion phone of the year along with the close competition from the Samsung Note 9 and Galaxy S9. However, the usefulness of the OnePlus 6 devices with much more recording allowance is a very big differentiator that in reality should impact your purchase decision much more than 960fps.