I will admit I did not watch the entire video in the OP, nor did I watch Chris' original video where he announced that he was putting the cards up for sale. So take this with a grain of salt.
Not trying to argue, but let's talk hypotheticals here. In
@cabalcoffers's video I saw that Chris seemed to have many copies of the card "Pokemon Trader". If you look online this card can be purchased in "lightly used" condition for
$0.69. OP mentioned in his video that the card sleeves of the binder were "jam packed" with multiples of the same card, of which several sleeves had this one in it. Let's assume there are a dozen of Pokemon Trader cards in the binder, that totals just over eight dollars. Not exactly life-changing money, and this is assuming that he sells
all of them.
He also noted that there was a "reverse holographic legendary" card on one of the first few pages he flipped through. That was the "Scoop Up" card, and it appears to be worth about
six dollars by itself. Six bucks for one card is a lot better than 69 cents per card, but he's sitting on a ridiculous variant of a re-issued card that doesn't appear to be in extremely high demand. Things like reverse holos only appeal to hardcore collectors because someone who actually plays the TCG can save themselves five and a half bucks by purchasing
the non-holo regular version of the card.
There are probably a handful of cards in that binder that are worth "actual money", in the range of maybe $10 each on a good day. The main problem
@cabalcoffers is going to face, especially with some of the older cards, is that most of them are no longer allowed in official tournament play so he's going to have to bank on collectors buying the cards from him, and collectors are notoriously anal about condition. Chris played with his cards, this means they probably are not in the condition that collectors want, and they are from card sets that are not allowed in tournament play so they are also of no use to players.
Maybe OP will get his money back if there's enough things that he can use to nickel and dime his way back to breaking even, but turning a profit from this endeavor might end up being more trouble than it was worth when you consider labor hours that go into sorting, cataloging, listing, packing, and shipping every single card not to mention the amount of time it's going to take for these to actually sell in the first place.