I found another link to
One of the more important documentaries that was made about events swirling around in the whirlwind of the war in Vietnam is the CBS piece entitled " The Uncounted Enemy: A Vietnam Documentary"
Since first doing a video on the doc, it was taken down. It is back up again (in pieces) on a different site but you can surf around and look for the title, you may find a better version.
(see video below)
Westmoreland's counterpart today General Mark Milley