Commercial Releases
While commercially released films can be played in class during educational instruction, the performance exception doesn’t extend to other purposes such as public screenings.
For many titles, a non-theatrical licence can be obtained from the distributor for a single screening in return for a fee:
For other titles you may have to seek permission from the rightsholder(s) directly. Check the © copyright notice to identify the correct rightsholder (usually the publisher) to approach.
Live Broadcasts
There is an exception in the Copyright Act that permits live television and radio broadcasts to be played in public.
Online video
Check the licence terms for the service, and the specific item, to determine whether an online video can be played (performed) in public. The terms of service for a subscription provider such as Netflix expressly prohibits public performances of content. In contrast, YouTube obtains rights from users posting content to their site that enables other users to perform it publicly, so long as it isn’t downloaded or copied.
Open Access Films
There are vast collections of films and documentaries released under open access licences such as creative commons. See the OER How Do I Guide for information on how to find open access films.