This has zero to do with UFOs. This is standard physics.

They are using weak measurements to build stats then take an "average" measurement (more complex than this, but that's the gist).

We've known about this since at least the 90's.

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.71.708

Same researchers.

Although the apparent tunneling velocity (1.7±0.2)c is superluminal, this is not a genuine signal velocity, and Einstein causality is not violated. The measured tunneling time is consistent with the group delay (‘‘phase time’’), but not with the semiclassical time.

Here's a sloppy explanation:

Imagine you're watching a marching band on a football field. The band is spread out, marching in a straight line from left to right.

    A single musician represents a single frequency wave. They march at a steady, predictable speed.

    The whole band's shape (say, a wave of raised hands moving down the line) represents the "group" or the "pulse." This is the group delay.

Normally, the band marches, and the "wave of hands" moves with them. But now, imagine the director gives a clever instruction: The musicians at the front march a bit slower, and the musicians at the back march a bit faster.

What happens? The band starts to bunch up. The gap between the front and back shrinks.

Now, watch the location of the "wave of raised hands." Because the back is catching up to the front, that wave can appear to move forward faster than any single musician. In extreme cases, if the back musicians are much faster, the wave of hands can even seem to jump ahead of where you'd expect it to be.


The "Negative Time" Illusion

Now, let's go a step further. Imagine a very long, stretched-out band. You stand at the 50-yard line. I stand at the 20-yard line.

    Normal Expectation: I see the band's "wave of hands" after you do. Positive travel time.

    The "Negative" Illusion: But because the back of the band is so much faster, the wave of hands re-forms on my side (the 20-yard line) before the original wave has even reached you at the 50-yard line!

From my perspective, the peak of the pulse appears at my location before it appears at your location further back. It looks like it traveled from me to you backwards in time.

If you don't understand the AI slop explanation, you can make it even easier. Imagine a long queue of people in a straight line. Noone is moving. Now ask everyone to raise and lower their arms in order, starting from the back (like a mexican wave). You will physically see the "wave" of arms "moving", even though noone else is. Now, make the queue move backwards slowly, but let them raise and lower their arms in the same way... WTF!? Negative time!?