Even a hypersonic aircraft wouldn't be capable of the maneuvers witnessed. It was also shaped like a tic tac, which doesn't align with any known hypersonic airframe shaping technique (like a wedge or waverider).
Unfortunately I can’t find the video right now, but there was a video I watched where the guy broke down the GoFast video using the angles and speed displayed screen, and made a very convincing argument that it’s not actually moving fast, but appears to be going fast do to parallax. Instead it’s basically going wind speed — like a balloon.
Similarly, as someone linked to elsewhere in this discussion, the images showing up as glowing ovals don’t actually mean anything. Everything shows up as ovals in FLIR artifacts.
I’m thinking these are just the most mundane of mundane items, that are only bringing detected because of ironically increased sensor fidelity.