A computer-implemented method for managing video contents includes collecting a plurality of keywords related to a topic, the keywords being collected using at least one dynamic data source. One or more sub-topics of the topic are identified using the keywords collected. A topic node in a taxonomy of topics is built, the topic node including a topic identifier for the topic, a child topic identifier for the sub-topics identified, and a keyword section for one or more of the keywords collected. A plurality of videos is organized using the topic node built to assist a user in locating a video of interest.