<<When the whistleblower took his copy of the tape , do you suppose he picked the worst one he could find? Do you suppose he left an unedited copy in the files?>>
Nope. Too much trouble. I think the whistleblower would have taken the only copy of the tape there was, the whole tape. Then maybe he edited it. In which case of course the Army has the undedited copy. Or he released the whole thing, and there is no unedited copy.
Now if he (whistleblower) edited the tape he stole, the Army has the whole copy. I can think of no reason at all why they would not then IMMEDIATELY produce the unedited copy and say, "Look, jackass, here's the whole story and it proves those guys were the same insurgents previously shooting it out with the choppers."
OTOH, if there was no extra 20 minutes of tape, I could see the Army claiming immediately "That's not the whole tape!!! We were framed!!!" and then going into overdrive to splice extra combat scenes into the original, probably using air-to-ground shots of other combats and using crew voice-overs. But this would take some time to get right, so that the fakery would be undetectable. Which might be still going on as we speak. Sooner or later the tapes would be produced, when the Army thought they had a fool-proof product. Or they could just claim that 20 minutes are missing and never produce the tapes on the grounds of "national security."
In any event, if and when the Army finally releases what it claims to be the whole tape, it'll never have any credibility because they'll never be able to account for their delay in producing it.
<<I expect that more is coming. The full length tape perhaps , but the only one who is certain to have a copy is the leaker who might have edited it.>>
The Army would be the likeliest to have the unedited tape in full, since that would probably be what the leaker stole. But then the delay in producing it could never be explained satisfactorily. It would be obvious that what they were producing as the full tape would have to be a fake, with 20 minutes fabricated to exonerate them.
<<Perhaps a more complete account of the battles that were occuring nearby , perhaps even some ideas of why those news men thought this group of men were news worthy.>>
It was my understanding, from a comment posted somewhere by another journalist, that journalists from the West usually attract a crowd of hangers-on, people who want jobs or favours. They were in all likelihood following the newsmen, not the other way round.