To play this video you need to enable JavaScript in your browser.
This video can not be played
This clip is from: Copyright First Broadcast: 23 October 2014
Next up
Test your understanding
Back to revise
Television
More guides on this topic
Industries overview
Magazines
Advertising
Film
Music
Newspapers
Radio
Websites
Computer and video games
Related links
BBC iPlayer
BBC Academy: Getting into TV
Creative Skillset: TV industry
Ofcom
E4 idents