You got that right, A.C. If these "documentarians" had done a smidgin of research, they would have found that the cartridges were destroyed long ago. So this means they are either too lunkheaded to have spent a small amount of time to find the relevant information, or they do know the truth and just want to cash-in on the legend and rumors.
Quote from Snopes:
Atari, stuck with millions of games and consoles that were largely unsellable at any price, sent fourteen truckloads of merchandise from their plant in El Paso, Texas, to be dumped in a city landfill in Alamogordo, New Mexico in late September 1983. In order to keep the site from being looted, steamrollers crushed and flattened the games, and a concrete slab was poured over the remains.