It's hard to tell from the video but you sex them the same way you sex Trimacs, Festae, and Salvini. Look for the black spot in the dorsal. I had a pair and the spot in the dorsal is very noticeable.
I was looking for that spot...I dont really see a "spot" but it seems the front area of the dorsal where the spot would be is darker....and the heavy pink on the neck makes me think female too.