19. The system of claim 18 , further comprising: receiving a query from a user; obtaining, from the video search index and based on the social attachment information, a search result using the query; and providing the search result for display to the user.
19. The system of claim 18 , further comprising: receiving a query from a user; obtaining, from the video search index and based on the social attachment information, a search result using the query; and providing the search result for display to the user. 20. The system of claim 19 , further comprising generating, based on the social attachment information, an annotation for the search result where the annotation indicates the association with a video content source and a relation to the user, and wherein providing the search result for display to the user includes providing the search result and the annotation.