1. A method, by a computing device, comprising: accessing a sequence of video frames stored in a buffer; receiving an indication for persistent storage of a particular frame of the sequence of video frames; analyzing frames before or after the particular frame of the sequence of video frames stored in the buffer to identify one or more social network objects; determining a value of the frames before or after the particular frame of the sequence of video frames based on the one or more identified social network objects; and selecting one or more of the frames before or after the particular frame of the sequence of video frames for persistent storage based on respective values of the frames.