{HEAD ~ Modifications} can be temporally made to all frames in a video stream, {TAIL ~ selected frames} in a video stream, or a single frame in a video stream 
temporally made to
{ HEAD ~ Modifications } can be temporally made to all frames in a video stream , { TAIL ~ selected frames } in a video stream , or a single frame in a video stream
HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH