That was a special effects documentary none of that was true it was just a movie on what it would be like if they really did exist or if we found them

The strange long-necked fossil creature, named Dinocephalosaurus orientalis, has not been found anywhere else in the world, says the researcher with the Institute of Vertebrate Paleontology and Paleoanthropology of the Chinese Academy of Sciences.
Two fossil specimens of the protorosaur were found in a marine limestone formation dating back to the Middle Triassic Period (230 million years ago) near Xinmin of Guizhou Province in 2002 and collected by the institute. One is the reptile's skull and neck fossil and another is its trunk.