This is slightly meta, but it's nice to see the attitude of the OP here. It quite matches my own.

It's always disappointing to see my work appear somewhere else without credit, but usually it is not worth moaning about. At the end of the day, he put that material up to be helpful to someone - and even if it wasn't used in the way it was intended, or with appropriate credit, at least it was still helpful.

It's a good attitude to have, I feel.

Especially as it means he gets to feel "cool, my work is in a hollywood movie" rather than "they stole my work". A much more positive feeling :)