I wouldn't call having to keep it mostly level and centered at hip height robust in the slightest. Check out around 0:35 in that video where he starts moving it

I wouldn't call having to keep it mostly level and centered at hip height robust in the slightest. Check out around 0:35 in that video where he starts moving it around once he rotates it just a little out of orientation (both directly towards the camera which seems very important and also the slight <20 degree rotation) that breaks the patch and YoLo figures out it's a person. Or again at 0:55 approx where it's moved slightly to the side it again breaks pretty immediately.