For Faculty: Copyright means copy right

Open Access refers to removing barriers such as "paywalls". Open Access initiatives seek to make research articles and other works easy to find and read, for free. It does not address copyright, but rather the methods of funding and accessing the research or other works.

Open Educational Resources are works that copyright owners have "opened" by adding a Creative Commons or other License that removes some copyright restrictions. The ideal is to allow others to "retain, reuse, revise, remix, and redistribute" without needing to ask for permission, as long as the work is attributed to the copyright owner, giving credit where it is due.

"In the U.S., any work created by a federal government employee or officer is in the public domain, provided that the work was created in that person's official capacity."...
"Keep in mind that this rule applies only to works created by federal employees and not to works created by state or local government employees. However, state and local laws and court decisions are in the public domain."

Summary: You need public performance rights: If the showing of the video is open to the public,.or..is in a public space where access is not restricted,.or.. a showing of a film by a club or organization. You do not need public performance rights: If you are privately viewing the film at home .or..you are an instructor showing the film in class as part of the course curriculum-> to officially enrolled students in a classroom that is not open to others to attend, .or..If the film is in the public domain.