While digging through video from the Lexus LS launch in January, I came across this CNET video with Jon Wong — it looks to be an advance preview with exclusive footage:
(Nice to get a quick look at how the reclining rear seats work, along with how the dashboard beside the central navigation lights up. This car is something else.)
Source: https://lexusenthusiast.com/2017/02/13/video-quick-look-at-the-2018-lexus-ls-500/