AFAIK, they’ve only used jumbo index the last few years at the featured tables. I’m pretty sure it’s because they’re the only setups that have RFID technology for TV. The rest of the tables are regular index/Copags.
FYI, I'm 99% sure the jumbo index cards used in that video are Cartamundi cards based on the size of the pips and font used. I have a set up of the casino backed cards inbound from Europe, but @surfik is selling Tobago casino single decks that I wouldn't be surprised if it is the same card stock and fonts used as the WSOP cards in the above video.