Same at my Costco. They have 6 or maybe even 9 “self checkouts” and each is manned by an employee who scans everything without removing anything from the cart. Its basically a compact checkout. Recently was in another area and the Costco had true self checkouts with weight sensors messing up and requiring employee overide and all. It was a pain in the ass.
The documentary you watched was probably on a different species. From the article:
“With the help of a sniffer dog, the team found traces of tunnels and discovered a golden mole in 2021. But because there are 21 species of golden moles and some look very similar, the team needed more to be certain that it was a De Winton’s.”