Last time I looked at the topic (several years ago in a now deleted reddit post); someone had posted info on the projector system.
The media is delivered on a battery backed up rack-mount pc with proprietary connectors and a dozen anti-tamper switches in the case. If it detects meddling; it wipes itself. You’re not likely to grab a copy from there.
As the other commenter mentioned; the projector and media are heavily protected with DRM, encrypting the stream all the way up to the projector itself. You can pull an audio feed off the sound board; but you’re stuck with a camera for video.