Former MilAnon here. I can tell you that in the AF in the 1980s we had retrofitted old fighters used as drones for target practice. I mean old ones, from the '50s and '60s. They were prepped with a special white and orange paint scheme, and modified for remote control I think at Edwards. Probably not any big secret. They could be flown by a pilot, or by remote. Some of them would occasionally land at our base for maintenance, or en route to whatever target range they were going to.
It seems pretty logical that something similar could have been used in this case. Any jet of the approximate size seen in the video would do, and it would not even have to be a military plane. If I were to put on my black hat, I would try to choose one that had the most resemblance to an airliner, and even paint it in airliner colors.