Check out the last few seconds of the video in this link:
U.S. Marines with 2nd Marine Battalion, 4th Marine Regiment, 1st Marine Division, and aircraft attached to Marine Aviation Weapons and Tactics Squadron 1 (MAWTS-1), conduct a Night Air Assault into Range 210 during Assault Support Training 4, Weapons and Tactics Instructor Course (WTI) 2-21...
www.dvidshub.net
Then look at the location and date of the exercise being recorded. Same day and same location as the Weaponized footage.
Credit to John Greenewald of the Black Vault for making this connection.
I don't doubt that Corbell and Knapp have received some legitimate tips from witnesses, but a click-grab like this gives people plenty of justification to patently dismiss anything he puts out.