1. A method for video browsing, comprising: comparing a current image frame with a previous image frame prior to the current image frame in a video to obtain target block information; identifying the current image frame as a keyframe when the target block information satisfies a predetermined condition; and playing the keyframe; wherein: the current image frame includes an image of a person, and identifying the current image frame as the keyframe includes: determining whether posture information of the person in the current image frame has changed relative to the previous image frame, and whether the target block information in the current image frame excluding the person satisfies the predetermined condition; and when the posture information has changed and the target block information in the current image frame excluding the person satisfies the predetermined condition, identifying the current image frame as the keyframe.