Frozen Planet is a BBC natural history series that has just begun to be broadcast.
The clips in this video come from Part 1 - "To the Ends of the Earth".
It is an outstanding programme that I would strongly recommend.
It is available for viewing on the BBC site:
If the link doesn't work don't blame me!
A search on the Internet for "Frozen - Planet - David - Attenborough" and you will find the full programme.