I'm not a personal injury attorney, but my understanding is that, if the film company bought workers' compensation insurance, as required, the cinematographer and director might be limited to that form of remedy, rather than a lawsuit. That is because employees cannot sue their employer or fellow employees for negligence. Their only remedy is a workers' comp claim.
On the other hand, if an injured party was retained as an independent contractor, rather than as an employee, s/he might be entitled to bring a personal injury or wrongful death lawsuit based on negligence.