Not often I come across movies based on lucid dreaming and this one just came out 4 days ago.
Some of it is in another language so you need subtitles but they actually go into what lucid dreaming is, doing reality checks and dream control methods. I’m about half way through it and so far really enjoying it.
It’s on prime video from Amazon.
Looks like it was based on a novel… maybe I’ll check that out too.