hoping others can chime in... in the title of the video it says "disregard comments on fake backs"...  does that mean the back theory was proved wrong? 
i am finding cards in PSA holders that sold on ebay with the stitching the same way as the card i am supposed to look at.. 
example of a PSA 5.. with stitching from right to left.... based on the below i would reverse my thinking and say the card is real... any input is appreciated.. 
 
