That's a reality glitch, multiple deer occupying the same location.

Spideer

SCP-6448 Not Deer

Ofc is just a fun glitch. Anyway if you''re interested in selling that defective camera for a good price contact us at this address:

totally.normal.stuff@amnestic.scp

That's a Falweyr. Looks like maybe a child-bearing male (the species has something like six genders). They travel sideways through time, so you only really encounter them at junctions where our time-flow bends. The camera must've been lucky enough to be set up at just such a position (if there are any auroras in the sky or one of those nights where you see a second moon super-imposed over the usual one is a good indicator). Beautiful creatures. Unfortunately their call sounds an awful lot like a Juggalo "whoop whoop" made through a wet poster tube. I once saw one while I was out foraging for truffles. We called it Gavin. It made eye contact with my brother and his nose immediately began to bleed and he could suddenly speak Icelandic (and he eventually forgot he had a family altogether). It got spooked and ran off in split directions.

The next morning all the pine trees smelled like orange blossoms and the ground where we saw the Falweyr was covered in a fine layer of something that looked like cotton candy. The area remained bereft of birds for six days. I'll never forget the experience (or, I suppose, maybe I'm pre-remembering it because it hasn't happened yet? Hard to tell with these things.)

That's just Herne the Spider Hunter. Don't mind him.

The deer / Splinter Cell crossover

Biblically accurate

While not a scary noise on its own, for some reason hearing that thing bleet like a sheep would be terrifying.

Eyy I know that heyik, their name is Foan.