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