I see 3+ lights in that footage, all of them are triangular shaped (likely a bokeh effect, or a combination). Around the 0:10 mark, you can see the other two to the left side of the screen, which seem to be connected to the bright blinking light. (I don't think those are reflections)
My immediate thought was that those 3 lights are forming the pyramid's base - not just the single prominent blinking light.
But checking the reactions across the net, everyone seems to be focused on the singular blinking light. Am I missing something here?
In the beginning of the video, you can see more of these lights as the camera pans away from them, too.
At first I though "what a boomer, ruining everyone's excitement", then I saw the video and yeah, that's definitely a bokeh. There are triangles everywhere in that video.