Is it a UFO? Is it a bird? No, it's an aircraft!
I was not able to contribute earlier to this thread as I was on holiday for its first four pages. Although the party appears to be over, I still would like to share some insights on the possible nature of the OP object from my analysis of a different video filmed by the same camera model, SiOnyx Aurora Pro. It is important to understand both capabilities and limitations of this new instrument that gains popularity amongst UAP and ghost hunters.
Here is the link to the video:
Source: https://youtu.be/PgWYyBWUKN0?si=X7p1L2nEi9YncBam&t=65
Unlike the OP videos, it was filmed by a stationary camera pointing to a clear patch of the sky between the horizon and the zenith and contains a continuous piece of footage from 1:05 to 20:15. This footage, corresponding to approximately 90 minutes of real time, has been sped up by about 5x. By superposing the stars in a screenshot with a relevant part of the sky map I deduced FOV of the camera being ~44° horizontally (which is close to the reported value of 42°). From the beginning to the end of the continuous piece of footage the rising stars moved diagonally across the frame by about 22°, hence the elapsed time estimate.
During this interval the sky patch has been criss-crossed by a menagerie of different objects, ranging from satellites and meteors, to aircraft flying at different altitudes, down to birds (and/or bats) and insects. Most of these objects are dots of light: faint or bright, steady or flickering. There are quite a few objects that have more pixels, and at least one of them looks similar to that in the OP video. It appears from 10:32 and has a faint forth light on one side of the triangle of bright lights:
Earlier, at 6:56, the frame was crossed at a different angle by a similar looking object, which is almost certainly an aircraft:
Another strobing aircraft-like object enters the frame at 11:21 with its three light dots being fused together into a Micky Mouse head-like shape, presumably, because it was at higher altitude than the previous one. There are a couple of space craft-looking objects, the larger one at 2:17, below, and the smaller one at 18:48.
Their rectangular "solar panels" are probably camera artefacts:
The 10:32 object is not only similar in shape to that in the OP video, but also would appear to move across the sky with a similar speed if the video footage in this post hadn't been sped up.
All this suggest to me that the OP object is probably a plane. This hypothesis was hastily dismissed in the beginning of the thread, based on the absence of planes above the location at the reported time, according to FR24 playback, but no evidence of the correctness of this time was presented. However, there was a plane a few minutes earlier passing over the location at the beginning of the red arrow.
I downloaded its track from adsbexchange.com and looked at it on Google Earth Pro from a point on the ground located near the beginning of the red arrow and underneath the flight track. The track passes through the right patch of the sky, entering and exiting it at approximately the right points and crossing it in far less than 32 seconds (the interval between two sequential recorded positions of the plane, the first at 09:28:16 was before the entry point, the second at 09:28:48 was well after the exit point),
Notes:
I have started writing this post well before
@Mick West posted the final comment of the original poster above.