On the SSUPD site they say:
Can NZXT 240 or 280 AIO like X53, X63, Z53, Z63?
Unfortunately, the pump head on NZXT is too tall.
However, EKWB, Corsair, Lian Li 240 and 280 AIO have been tested to work.
But on OT video you can clearly see that he use a NZXT AOI Liquid cooler and I don't see a...