Having observed early video reviews it appears that the display of the Asus Zenfone 3 Deluxe flickers.  Unsurprisingly, the device utilizes AMOLED display technology that is notorious for flicker.

You’ll see from around 0:28 in the video below the flicker is captured by the relatively fast shutter speed of the camera recording the video.  Without knowing the shutter speed it’s impossible to calculate the exact flicker frequency, though from other AMOLED panels we expect it to be within the problematic range of 200 Hz to 240 Hz.