If a broadcast material is used for teaching at a nonprofit institution, distributed without charge, and made by a teacher or students acting individually, then the copy is more likely to be considered as fair use. Where only a small portion of the work is to be copied and the work would not be used if purchase or licensing of a sufficient number of authorized copies were required, the intended use is more likely to be found to be fair. A A work in the public domain can be copied freely by anyone. Such works include those of the Government and works for which the copyright has expired. A work in the public domain is one that can be freely used by anyone for any purpose.
Public domain is more the exception than the rule.
A public performance license is necessary for any broadcast of a television program that contains music. The performance right must be licensed from the copyright owners of the composition, or their publishers, and the sound recording used. A blanket license has traditionally been secured, usually from a performing rights society. A A blanket license allows the licensee to use any item in the performing rights organization's catalog or repertoire for a specified period of time, without the need to negotiate for the performance right of each individual composition. A A synchronization license is required to permit the music to be fixed to an audiovisual recording.