Kubrick didn't work alone, so others can confirm/deny...
Kubrick needed a *ton* of people to help him put "The Shining" together. Actors, set designers, make-up artists, etc.
A lot of these people are still alive today. Those who aren't have certainly talked about the film before they passed. There are interviews, articles, old storyboards, *SOLID PROOF* of shot constructions, etc... there's no need to speculate about Kubrick's intents.
Did Kubrick let *anyone* know the cans of baking soda were so important? Did Kubrick ever *once* talk about how "The Shining" was a reflection/allegory/representation/WHATEVER to the Holocaust?
Did Kubrick let the actors know, "When you shake hands with Jack Nicholson, be sure to position your crotch over the paper tray in the background so it looks like you have a *HUGE BONER*!"
These people narrating this documentary are out of their goddamn minds. They're reading too much into *NOTHING!* Show me some *EVIDENCE* that these "magical scenes" and "subliminal messages" mean something and *THEN* we can talk. Until then, this is total horse *beep*
Watch "Room 237" if you want a good laugh. Watch a different documentary if you want to learn something.