Pretty sure most of the movie is filmed of the woman in a pod. (Size of a coffin) It is high tech, looks like a stasis pod or medical pod with a heads up display she uses to interface with the pod. She wakes up inside it, and spends most of the movie lying on her back interacting with an AI? or computer voice as she tries trying to hack it to get it to open up and let her out.
Something (maybe her trying to hack it?) damaged the pod and her oxygen is running out. (Maybe it was damaged before and the computer woke her up to inform her.)
She might also be having flashbacks to before she entered the pod (childhood?) I think she has amnesia and cant remember who she is.
It is probably less than 10 years old, in English. Except for her and the computer voice and a man whom she finally gets in contact with, there is no one else shown (Not 100% sure if there were any flashbacks).
It's possible it was not a movie, but an episode of a Twilight Zone or Outer Limits type show.