1. A computer-implemented method of adding textual metadata to a given video, the method comprising: selecting a set of videos that are related to the given video; training a classifier for the given video using the set of selected videos, wherein the classifier includes a plurality of weighted features, including textual features; determining from the classifier at least one significant textual feature; and adding the at least one significant textual feature to the metadata of the given video.
1. A computer-implemented method of adding textual metadata to a given video, the method comprising: selecting a set of videos that are related to the given video; training a classifier for the given video using the set of selected videos, wherein the classifier includes a plurality of weighted features, including textual features; determining from the classifier at least one significant textual feature; and adding the at least one significant textual feature to the metadata of the given video. 13. The computer-implemented method of claim 1 , further comprising selecting an advertisement for display in conjunction with the given video based upon the added at least one significant textual feature.