I've seen a truncated version of the video, and it was represented to be a AH-64B attack --- which did not quite jive with my experience, although my experience is rather dated.
It's here on Snopes:
http://www.snopes.com/politics/military/apache.asp
No such animal. The proposed Bravo upgrade was cancelled in 92.
From your link:
"Army officials acknowledged that the 30 mm cannons used by the Apache gunners were far bigger than what was needed to kill the men, but said it is the smallest weapon the Apaches have."
Which I find rather funny, implying as it does the original question "how horrid - did you really have to use such a large gun?"
Yes, the truncated version omits the footage which shows what the pull-starts were doing prior to becoming red mists in the field. I believe that the truncated version was a French media mod to portray the US as firing indiscriminately on innocent civilians.