Adding video

This is one of the videos i am planning on using in my iBook. . . 

I will be using this video in my iBook as it shows a family of Polar Bears emerging from their den. 

I have chosen this video i found on youtube as it will fit well after the page where i have written about Polar Bears in my book.  I also chose this video because it was added to youtube by the BBC Worldwide youtube account and is a clip taken from a documentary film by David Attenborough. 

This makes the video perfect to use in a reference book like mine about the arctic because it has the gravitas of being from a well known documentary series rather than being a video recorded by an un reliable source.