Implementations disclose determining which videos are newsworthy events. A method includes identifying, based on data extracted from online content, a knowledge base (KB) entity corresponding to the online content, identifying an embedded video in the online content, recording an online content identifier (ID) of the online content and a video ID of the embedded video as an entry for the identified KB entity in a KB reference data store, determining at least one video ID that occurs more than a threshold number of times in the entry for the identified KB entity in the KB reference data store, and identifying a resulting video corresponding to one of the at least one video IDs as a candidate for a notification to one or more users.