I hate to say it, but watching “Body Cam” (2020) made me wish I was watching a film with a more interesting plot device involving police officer body cameras. For example, a movie shot entirely with body cam and dashboard cam video would be cool. The film I was watching was boring. It was a police procedural hiding inside a horror flick (or maybe vice versa). It touches on hot topics (officer-involved shootings, PTSD) but not in an interesting way. Mary J. Blige stars as a cop and shows limited acting range, but no worse than any other B-movie star.