Magnus: Yes, I am as serious as a heart attack. I’ll tell you what I have told others, who wish to do what I am doing.
When you create an idea for a motion picture, the most important thing you need to do, is prove beyond any and all doubt, that you thought of the idea, first. Here are some ways you can accomplish that:
1. Take your idea to the Post Office, buy a first-clas stamp, place a stamp on each sheet of your idea, then ask the postal clerk to cancel the stamp in front of you. S/he will do that, and the cancelled stamp on your sheet(s) will give you date proof that you thought of the idea, first.
2. Place your idea inside two separate envelopes and mail both of them to yourself, via certified mail, return receipt requested.
When you get them, make sure that at least one of them never gets opened, except in a courtroom, in front of a judge and jury. That will also supply date proof that you thought of something, before anyone else.
3. Apply for a formal copyright with the US Government. That will afford you protection and proof.
4. The best way (besides a formal copyright), is via the Writer’s Guild of America. There is a $20 charge for having your work registered with them (if you are not a member), and I can assure you that it is worth every nickel.
I hope that my advice is helpful to you, and “Break a leg!”