1. A system comprising: a computing platform having a hardware processor and a system memory; a metadata extraction and management unit stored in the system memory; wherein the hardware processor is configured to execute the metadata extraction and management unit to: extract a plurality of metadata types from a media asset; aggregate the plurality of metadata types to produce an aggregated metadata describing the media asset; use the aggregated metadata to include at least one database entry in a graphical database, wherein the at least one database entry describes the media asset; display a user interface for a user to view the media asset, the user interface further displaying a timeline metadata, and a plurality of horizontal bars each corresponding to a different one of tags associated with the media asset and each extending along the timeline metadata to indicate presence of the corresponding tag in the media asset; and correcting presence of one of the tags in the media asset, in response to the user extending or reducing the horizontal bar corresponding to the one of the tags via the user interface.