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Ha! Sorry for the long explanation of the wrong video!

This is a grainy video. A big hint is that you know he is in right Dix-Hallpike. Left posterior canalithiasis wouldn’t produce this robust response in right Dix-Hallpike position. For me, the nystagmus is most clear when the patient has his eye open completely and the nystagmus starts to “settle” a bit – around 17 seconds and 28 seconds are little windows where I think it is easier to see.