YouTube has changed the viewing habits of millions around the world and it was pioneering vloggers such as Zoella Sugg, Jack and Finn Harries, Caspar Lee, Marcus Butler and many others who built their channels up from scratch, that broke the mould and put their lives online for all to see. They used to be called 'the most famous stars you've never heard of', but since then they've gone on to win worldwide fame (by popular demand, Zoella and Alfie Deynes even have their own waxworks in Madame Tussauds). Complete with tips to help you produce your own content, this is their story.