I've always enjoyed films that focus on the process of filmmaking itself. Regardless of whether it’s a classic like Fellini’s “8 1/2” or something more recent such as "Adaptation" or "Seven Psychopaths," I rarely tire of these self-aware movies. They consistently remind me that even with all the effort, hardship, and drama put into cinema, there's always space for humor. That being said, Diego Rougier’s “Sal,” …