By starting their careers with a YouTube channel, some of the most famous YouTube stars have written books, been on TV and toured the world doing live shows. DanTDM went on a tour of America, Australia and the UK in 2017. Tickets sold out in minutes, with no advertising except Dan talking about the tour on YouTube. It’s not surprising if you think that Dan’s YouTube videos have been watched almost 11 billion times. Films and TV can’t even begin to compare with numbers as high as this. The biggest worldwide TV show, the music competition Idols, has been watched by about 6.5 billion people and about 5 billion people saw a part of the 2008 Summer Olympics in Beijing.