Thanks for yor answer! @EliasWick is getting closer to what I am looking for. If you know a way I can possibly edit the UV to lock it in a vertical position and display it as a post process material, that would help me a lot.
I just realized that it could be similar as to when you include damage effect vignettes around the borders, but I want to lock the image aspect ratio in the center rather than lock the aspect ratio in the borders of the viewport.