Docudrama
Docudramas are dramatized adaptations of real-life events. While not always completely accurate, the general facts are more-or-less true. The difference between a docudrama and a documentary is that in a documentary it uses real people to describe history or current events; in a docudrama it uses professionally trained actors to play the roles in the current event, that is "dramatized" a bit. Examples: Black Mass (2015) and Zodiac (2007).
Docufiction
Unlike docudramas, docu-fictional films combine documentary and fiction, where actual footage or real events are intermingled with recreated scenes. Examples: Interior. Leather Bar (2013) and Your Name Here (2015).
Comedy Drama
Many otherwise serious productions have humorous scenes and characters intended to provide comic relief. A comedy drama has humor as a more central component of the story, along with serious content. Examples include Three Colours: White (1994), The Truman Show (1998), The Man Without a Past (2002), The Best Exotic Marigold Hotel (2011), and Silver Linings Playbook (2012).
Crime Drama
Crime dramas explore themes of truth, justice, and freedom, and contain the fundamental dichotomy of "criminal vs. lawman". Crime films make the audience jump through a series of mental "hoops"; it is not uncommon for the crime drama to use verbal gymnastics to keep the audience and the protagonist on their toes Examples of crime dramas include: The Godfather (1972), Chinatown (1974), Goodfellas (1990), The Usual Suspects (1995), The Big Short (2015), and Udta Punjab (2016).