C'est supposer entrer dans le fair use si un enseignant présente un film à sa classe, pas besoin d'avoir de droits de diffusion.
C'est tu si supposer que cela, parce que bien des émissions de télévision prenait le temps de relâcher leur droit d'écoute en public d'enregistrement aux écoles, découvertes notamment il me semble.
Aux états-unis ça semble maintenant assez clair en tout cas:
The Classroom Use Exemption
Copyright law places a high value on educational uses. The Classroom Use Exemption (17 U.S.C. §110(1)) only applies in very limited situations, but where it does apply, it gives some pretty clear rights.
Obama in class by-nc Gilkata
Obama in class CC by-nc Gilkata
In-class viewing is a public performance, but it's permitted under the Classroom Use Exemption
To qualify for this exemption, you must: be in a classroom ("or similar place devoted to instruction"). Be there in person, engaged in face-to-face teaching activities. Be at a nonprofit educational institution. Sounds a little restrictive?
If (and only if!) you meet these conditions, the exemption gives both instructors and students broad rights to perform or display any works. That means instructors can play movies and music for their students, at any length (though not from illegitimate copies!). Instructors can show students images, or original artworks. Students can perform arias, read poems, and act out scenes. And students and instructors can do all these things without seeking permission, without giving anyone payment, and without having to deal with the complications of fair use.
Au canada ça semble différent (et être comme avant:)
In Canada, fair dealing as defined by the Copyright Act is more restrictive than the fair use provisions in the United States, particularly in regards to education and teaching.
For example, in the United States, showing films or videos in a classroom without special permission or performance rights is permitted. In Canada, public performance rights must be acquired to show a video or film in a classroom.
The United States also allows making copies of works for distribution in class. In Canada, it is forbidden to do so without special agreement or payment to the copyright owners, such as via the Copibec licence.
For additional information on the differences between fair dealing in Canada and fair use in the United States, see the summary table (PDF) prepared by the Association of Universities and Colleges of Canada.
In Canada, teaching is not listed as an example of fair dealing and is only covered in the specific educational exceptions as outlined below.
https://library.concordia.ca/help/copyright/?guid=fdvsfu