This one starts a long way in the air ~ it seems to begin beyond the horizon (quote from the guy who did the film).
The dilemma for the proponent is he has to 'splain how this whole picture came together in a few seconds ~ and that includes a nearly mile wide plume at the horizon (from 35 to 62 miles away given camera elevation ~ aperture width is a separate issue but can be dealt with by reference to degrees of horizon seen by the camera)
(You can check mileage, etc. by simply picking up a map and drawing circles with the helicopter at the center. Match the picture with the landscape at that various corresponding points within the picture ~ i used a different method ~ "estimation of maximums and minimums")
however great a plume from an aircraft might be, you have to create that plume from a rocket exhaust in seconds.
Still, the plumes from an aircraft are almost entirely very cold ice crystals at high altitude. This is above Everest.
They can disperse a long way before sublimation, so an aircraft can give you a very wide plume due to wind movements affecting it. You don't have that option with a rocket while it's still visible in launch phase since it moves so fast wind won't have had time to blow the plume apart, or make it look wider.
Some of the NASA pictures of airliner contrails from space are fantastic. They last a very long time and get quite large before they disappear.
Not a mile wide without being extremely thin. You didn't address how wide an airplane contrail would be if it extended to the apparent horizon in the camera's view.