If you’ve ever ridden in a private airplane with a good view on a sunny day, there is a shiny bright spot on the ground exactly where your shadow would be. It’s the sun reflecting from things on the ground that happen to reflect light back to you. It follows along the ground at exactly your speed. If this spot is recorded on a video camera and the plane rolls, the spot will appear to move very quickly due to the angle change of the airplane. If the camera is on a gimbal, the spot will appear to move as the gimbal changes angles. The speed at which the spot moves can appear to be well above Mach 1.
This exactly what these so-called UFOs could appear to be.
Agree in the sense that an object on the ground or ocean is a likely answer. When the average person sees the clouds moving so fast in the video, they think that is due to the object moving, when the fast moving clouds are due to the PLANE, itself, moving. Moving clouds like that would appear even if the object was completely stationary, on the ground. Other images like this have gone unexplained when it turned out they were ships or oil platforms burning off excess oil, which triggered infrared etc tracking.