How do I strip "Giant River Company" encryption from purchased movie?

Ages ago I bought a movie off of a certain company's video streaming service. We will call them GRC for short since I do not want to draw the attention of their bots. I downloaded the movie onto my PC via the GRC Windows 11 app, but rather than a simple .mkv like I hoped, I found a folder with 5 different files. Two of them are .mp4s whose names end with audio_5 and video_12 respectively. Two of the files are something called .MPD files. One of them is something called a .DFXP File.

Does anyone know how I turn this mess into something I can play off a Plex or Jellyfin server? The *_video_12.mp4 is 110% encrypted since nothing plays when I run it through VLC.

Edit 1: I am doing my own research as well. An old thread a few years back claimed Aimersoft could break the encryption, but when I tried to use it the program just crapped out on me. If anyone is reading this and doesn't know the answer, you can help out by upvoting the thread. The more eyes that are on here, the higher the odds we can break this DRM together. Thank you :)

Edit 2: I believe the encryption can be removed with ffmpeg, but I will need to get the WV encryption keys first. Does anyone know how to do this?

Final Edit: From my readings in this thread, and research elsewhere, this sort of project looks to be best done in the hands of pros. Intercepting these keys requires a certain degree of skill I do not have. So to answer the thread's titular question: "Bypass it all together." Get a capture card, HDMI splitter, and just record the movie.