11. A social video search system comprising: a processor, and; a memory storing instructions that, when executed, cause the system to: receiving a query from a user; obtaining social context information about interactions of the user from a social graph; obtaining a search result using the query; modifying a ranking of the search result based on an association with a particular source and a relation to the user to produce a modified search result; generating an annotation for at least one search result where the annotation indicates the association with the particular source and the relation to the user; and providing, for display to the user, the modified search result and the annotation for presentation.
11. A social video search system comprising: a processor, and; a memory storing instructions that, when executed, cause the system to: receiving a query from a user; obtaining social context information about interactions of the user from a social graph; obtaining a search result using the query; modifying a ranking of the search result based on an association with a particular source and a relation to the user to produce a modified search result; generating an annotation for at least one search result where the annotation indicates the association with the particular source and the relation to the user; and providing, for display to the user, the modified search result and the annotation for presentation. 17. The system of claim 11 , wherein the social context information include video context information.