Prism's lip-sync performance of "Armageddon" on the October 23rd, 1979 broadcast of the CBC TV variety show "The Raes" - recut the album audio from 7:45 to the radio edit of 4:14, cleaned it up, tightened and reformatted the footage.
The aircraft footage and effects during the performance was added either by Prism or the CBC.
Original video can be found at
https://youtu.be/dsmT1mvQCBk
I guess this is as close to an official video for "Armageddon" as you're going to find.
Hope you enjoy!!