It's about the production of movies, not the distribution of movies. I don't think people in this thread are reading the article. The original title of this submission didn't help.
The "tariff" we're talking about here would be for where the labor comes from. If a EU film company is choosing to film in the US instead of at home for cost reasons, then sure they can put a tariff on that somehow to keep it local. I don't think that's happening in any meaningful way, but it is in the reverse to the detriment of thousands and thousands of local jobs in LA, ATL, NY, etc.