10. A video classification method, comprising: text mining, by a device comprising a processor, metadata of a word combination that is a noun-verb combination or a verb-noun combination and that is associated with a video sample for the word combination; storing in a memory of the device, the at least one of the noun-verb combination or the verb-noun combination as a video category label among a set of category labels; and filtering the set of video category labels containing the at least one of the noun-verb combination or the verb-noun combination stored in the memory based upon a lexical hierarchy.
10. A video classification method, comprising: text mining, by a device comprising a processor, metadata of a word combination that is a noun-verb combination or a verb-noun combination and that is associated with a video sample for the word combination; storing in a memory of the device, the at least one of the noun-verb combination or the verb-noun combination as a video category label among a set of category labels; and filtering the set of video category labels containing the at least one of the noun-verb combination or the verb-noun combination stored in the memory based upon a lexical hierarchy. 13. The method of claim 10 , wherein the lexical hierarchy constrains a verb of the at least one of the noun-verb combination or the verb-noun combination to be within hierarchies of act, move; act, human action, human activity; or happening, occurrence, natural event.