An AV work is composed of sound, sequence of pictures or both. AV works include motion pictures, videos, audiocassettes, CDs, DVDs, etc. AV should not be confused with multimedia which may include several types of AV materials, but has different guidelines.
When discussing AV works, we are talking about Performance and Display rights as well as Fair Use.
The 1976 Copyright Act provided for performance and display(Section 110) in face-to-face teaching situations only. Performance and display to distance students were not allowed under this law unless permission was given or performance rights were licensed with the AV item. Many videos today allow performance rights in the purchase and the library includes this whenever possible. If performance rights are covered under a purchase agreement, then fair use or the TEACH Act cannot be applied; a licensing agreement takes precedence. Transmission over a closed-circuit television within the same building may be permissible. Section 110(2) was amended by the TEACH Act in 2002 to allow transmission of materials to distance education students.