Funny story on the origins of Hollywood. Hollywood was a safe haven for filmmakers using imported technology to run away from thugs hired by Thomas Edison. Not sure why someone hasn't made a movie yet.
Pretty much, you filmed on rooftops in the northeast in the olden days. If you used illegally imported cameras (Edison had a bit of a monopoly), Edison's thugs would show up and push some people off the roofs.
They tried moving all sorts of places, most notably Arizona where people were shot by "cowboys" hired to kill illegal filmmakers.
LA offered to protect the filmmakers, and they settled there, and then made a monopoly of their own.
For a while after that, the monopoly continued. The studios owned all the theaters so they effectively made every penny a movie could make. They were allowed to continue the monopoly until after WW2 because they were making propaganda films.
So one of three ways.
1. Harsh patent laws regarding cameras and film equipment never go into effect.
2. LA does not protect film makers
3. The Hollywood monopoly is broken up almost immediately.
4. Most of the studios fail post-monopoly (IOTL, only one major studio failed.)
Those are your best shots to do it in, after that Hollywood becomes too powerful.