12. The storage medium according to claim 10 , wherein: the characteristic information of the video file is a hash code of the video file, the standard caption database comprises captions and hash codes of video files associated with the captions; the voice textualization database comprises textualized captions and hash codes of video files associated with the textualized captions; the step of obtaining the characteristic information of the video file to be played, and searching for the caption, for the video file to be played, in the standard caption database according to the characteristic information comprises: returning, if the hash code of the video file to be played exists in the standard caption database, a caption associated with the hash code; or searching for a caption in the voice textualization database, for the video file to be played if the hash code of the video file to be played does not exist in the standard caption database; and the step of searching for the caption, for the video file to be played, in the voice textualization database if the caption of the video file to be played is not found in the standard caption database, so as to generate the search result comprises: returning, if the hash code of the video file to be played exists in the voice textualization database, a textualized caption associated with the hash code; or performing the voice textualization process on the video file to be played if the hash code of the video file to be played does not exist in the voice textualization database.
10. The storage medium according to claim 9 , wherein: the step of obtaining the characteristic information of the video file to be played, and searching for the caption to generate a search result comprises: obtaining the characteristic information of the video file to be played, and searching for the caption for the video file to be played in the standard caption database according to the characteristic information; and searching for the caption, for the video file to be played in the voice textualization database if the caption of the video file to be played is not found in the standard caption database, so as to generate the search result.