Music and multimedia copyright can be a very complex area to navigate. A single musical work can have two separate copyrights: the composition (music and lyrics) and the recorded performance of the work. And the original composer or lyricist or performer doesn't necessarily own the copyright after it has been published.
Use of music, video, or other multimedia in a face-to-face class is handled differently than in an online class. Use of multi-media in an online class is restricted to a "reasonable and limited portion of the work", usually no more than 10%, while an face-to-face class may use the material in total.
Consider the four factors of fair use before making a copy. Some additional details about when copying sheet music is prohibited or allowed are provided by the Music Publishers Association website:
Public performance rights are the legal rights required to show media to an audience. These rights are not usually included when a library or individual purchases a DVD or video. Here's what you need to know to legally show films to an audience:
Some documentary and educational videos provide public performance rights at the moment of purchase. Though each license will vary, in general, showing the film publicly is possible when conditions listed in the license are met. The license is available from the library catalog. Ask the librarian if you have any questions.
These kinds of restrictions may be included in the license:
If the film you want to show does not already have public performance rights, you can try to purchase them from the copyright holder, the distributor, or from a rights-management organization. Some companies that sell public performance licenses include: