I'll chime in here - I didn't have mine authenticated separately but to be honest I didn't feel the need to. I examined the bag very closely when it arrived and it had all of the proper markers I would look for terms of leather quality, stitch numbers on the quilts, quilts lining up, the brand of zipper, proper stamps and positioning etc. The holo sticker also had the right numbering and patterning/look for the series (right down to the type/font of numbers used), and the number matched the authenticity card - although I personally think the holo is more important than the card.
It's true the sticker/card isn't shown in the greatest of detail in the video so it's a bit of a leap of faith, but I went with my gut and the vibe from the seller.