I have sat on the beach and watched commercial airliners turn into what appear to be missile launches several times.
And what ultimately proved to you that they weren't? How long did it take you to observe them before being able to determine for certain that they were planes instead of missiles?
No normally sighted congizant human being is going to be fooled into thinking a horizontal airline contrail is a vertical missile plume for long.
That cameraman sure must have been awful stupid. Not remotely as smart as you, TomTom.
*rolls eyes*
And if it was a missile, traveling at, say a modest Mach 2.5, then there is no way it would have remained in view for 8 minutes. No way. And, Cruise missiles don't have a plume trail and while ICBMs launch with a plume, they fly a boost phase only as they rise up to enter a ballistic phase (with no rocket motor exhaust). They do not fly a flat trajectory.
Take a pic next time.