Hi Chara,
Is there a text version anywhere? Every time the video starts my RealPlayer crashes.
My impression is it was only a story about a breed of dogs that was generated from only a few breeding pairs of animals. They were carrying a recessive deleterious allele of some gene and now it is at a high frequency in the dog breed. This is a fairly common occurrence and is why geneticists study inbred populations to get a better handle on diseases. In humans to i.e. studies of the Amish or the Ashkenazhi jews.
Cheers,
M