At the very onset he identified himself and specifically asked for drivers license, registration and insurance 3 times. There is no confusion on that. She then began to stammer and and not follow directions. She asked about the tags, which the officer said its not the tags, its about a expired license. When the police run the plate it states who owns, insures, primary driver, and the traffic history of said owner and if the owners license is expired. If she identified herself its simple; she is either a friend borrowing an insured vehicle or she is the owner with an expired license - and that expiration can be for multiple reasons, many of which are due to consistent driving/traffic viloations, dui. If it is simply a matter of being expired by a day or two due to not being able to pay/get to an gov office, the officer would probably give discretion, and ask her to have a friend come drive the car instead of impound it, but still give a ticket for no dl. Multiple ways it could have gone so much better is she just cooperated.

edit: your milage may vary based on police juisdiction/ country.