An airplane heading to Phoenix would have flown over the cameraman's head as shown in the bottom image, it would not have disappeared into the west. Phoenix is not west of Los Angeles. Personally, I don't give a damn what it was, I wasn't there. The video shows a rocket exhaust. If it was an airplane, then it was a rocket powered airplane, headed out to sea.
People can become kind of intransigent when presented with the argument: You idiot, this matter is settled! Ask Algore about that. Piss on their (our, my) leg and tell them that it's raining, and watch them (us, me) disagree, even with the Navy and Glenn Beck on your side.