YouTube was the top search result for 2008 in 11 major countries

YouTube was the top search result in Google for 11 major countries in 2008 - Austria, Finland, France, Hong Kong (OK, not a country), Italy, Malaysia, Mexico, Spain, Sweden, Switzerland, & Taiwan. This is 11, out of a total of 34 countries reported on by Google.
This shows two things - that YouTube is incredibly popular globally, and that people use search for navigational purposes - that is to find specific things that they already know (rather than type in a term like 'video site')
Source: Google Zeitgeist 2008