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