There’s an outside chance it’s some kind of natural phenomenon, isn’t there?
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Sure something natural ... what could be more natural that someone’s ship? And there are many of them in the video, most are round, but one has a closeup showing rings, another is tripod shaped. All of them are huge - almost planet sized.
They scoot away because they are full of plasma which they use as fuel or convert into fuel, and to make room for more of them to suck plasma.
Sort of like the photino birds made of Dark Matter in Steve Baxter’s Xeelee series ... trying to convert the sun and all other stars into stable red dwarfs which do not threaten their existence by exploding.