We've been going on about the BBC a lot this week. It has a new strategic direction... or, at least, its director general wants it to have one. There's a lot of argument about it. But what pretty well everyone agrees is that the future of the licence fee is crucial. Will young people (who haven't started paying it yet) be happy to do so if they believe they can get their information and entertainment elsewhere? John Humphrys talks to a group of teenagers at Perry Beeches School in Birmingham about whether they watch the box at home, and if not, what do they do?