It will be VERY hard to find an outside buyer for a business with decreasing sales, questionable current profitability, and even more questionable future profitability. That is just finance 101.
If there is to be a sale of the film division it would likely be structured as a management buyout in which certain key people in the film division would "buy" the operation via some kind of creative financing deal. Being free of certain former constraints, the management of the new company will have interesting ideas on how to operate the business profitably. The ideas might work. They might not. In any case, it will be risky.