To let you know a little of what to expect from the video in the OP...
"Daniel Tammet is an autistic savant. He can perform mind-boggling mathematical calculations at breakneck speeds. But unlike other savants, who can perform similar feats, Tammet can describe how he does it. He speaks seven languages and is even devising his own language. Now scientists are asking whether his exceptional abilities are the key to unlock the secrets of autism."
http://www.guardian.co.uk/theguardian/2005/feb/12/weekend7.weekend2
thanks for explaining the video,my youtube is stalling and i can't watch it...........my middle child has a form of Autism and i like to read all i can...