This was recorded from a satellite “backfeed” distributed to cable companies during the first gulf war. The viewer would normally be seeing commercials during part of this time, but they keep the feed going anyway. These days satellite feeds are encrypted so there’s no way to know what goes on behind the scenes, although the finished product speaks for itself.
Note the total lack of delay in the dialog between the anchor in atlanta and the purported feed from saudi arabia around 4:30. Most likely the reporter is actually in atlanta, possibly in or on top of the cnn building.
The “attack” at the end of the tape turns comedic as one reporter goes for a gas mask while the other puts on a helmet. Were they all snorting pentagon-supplied coke?