Heres a quicker version of that first gif:
I defo think this looks like the top of some alien creatures head, you can see the shine/slimeness, the orientation would be that it is facing the camera with its head facing a bit to our left/it's right.
As it moves its head to our left you can see the back of its head wobble a bit, the shine and reflections on it are uniform over the whole object, it looks a bit like some huge elongated serpent/worm shape, i'm sure the shine is being confused with a helmet visor.
Maybe im wrong but something about it just looks very Alien to me, not saying it's a Xeno or a Jockey but i'd defo wager on this being some form of alien life that is wreaking havoc here.