Strange, in actual combat the selector is always on burst or Auto(depending on wheter you a M4 or a M16A2/3), and the trigger finger never leaves the trigger until you run out of loaded mags.
Survival always seems to overide safety when the SHTF!!!
The M16 video is in the public domain and may be downloaded from http://www.archive.org. I have a copy of the video on my mp3 player. archive.org also have several other public domain M16 documents listed (Do a search for M16 within archive.org).