According to one aspect of the disclosure, modifications are spatially made to an entire video frame, one or more selected regions of {HEAD ~ a video frame}, or {TAIL ~ one or more individual pixels} of a video frame 
According to one aspect of the disclosure , modifications are spatially made to an entire video frame , one or more selected regions of { HEAD ~ a video frame } , or { TAIL ~ one or more individual pixels } of a video frame
OTH OTH OTH 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 OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH