A film of dust on the piano.
Film a rocket launch; film a scene from a ballet.
The window filmed over with moisture.
An example of a film is a layer of grease over the top of a cup of soup.
An example of a film is Grease.
An example of to film is to pour a layer of grease over soup.
An example of to film is to tape a home video of Christmas.
This novel won't film well.
"A Hollywood studio was filming on-location in NYC."