"Stowaway"
Directed by Kate Siegel
Written by Mike Flanagan
A woman named Halley, who is implied to have left her husband and child behind, documents her findings of possible extraterrestrial encounters in the Mojave Desert. As night falls, she witnesses a light fall from the sky and goes to investigate it.
She finds an alien spaceship and enters to examine its interior; when she accidentally cuts herself, small nanites come out and heal her. Halley quickly learns that this causes minor mutations due to the ship keeping animals in stasis and copying their DNA. After she hides from an alien, Halley realizes that she has no escape. The nanites appear again and heal her injuries as the ship accelerates to light speed, throwing her around and injuring her again.
Healed once more by the nanites, Halley begins to suffer more and more gruesome mutations to her body due to the cycles of injury and repair as the footage ends.
https://en.wikipedia.org/wiki/V/H/S/Beyond