The professor who helped Google's founders get the company off the ground has warned that President Obama is leading the United States on a "crash course" towards economic disaster.

David Cheriton, who taught Sergey Brin and Larry Page at Stanford University in California and became a billionaire as Google grew, said that America's innovators and investors were being driven overseas in search of opportunity.

The BBC's Matt Frei spoke with Prof Cheriton on the Stanford campus.

Watch more: Is the US heading for economic disaster?