The BBC video can be found here: http://news.bbc.co.uk/1/hi/entertainment/8635562.stm
He specifies the tips are for writing fantasy for boys and the video title says for children but I think the tips are applicable to writing for all ages. One or two of the tips could actually be applied to all types of fiction writing. I really recommend watching this.
I found this video from a BBC article about the new Artemis Fowl film, found here: http://www.bbc.co.uk/news/entertainment-arts-23528980