Copyright laws and policy are put in place to protect the owners of intellectual property. Many materials like literary, musical, and graphic works are protected by state and federal laws. On a more local level policy dictates the actions of individuals. Universities like USF have their own copyright policies. Take a few minutes to familiarize yourself with USF Copyright Policy found at: http://usfweb2.usf.edu/usfgc/gc_pp/GENADM/Gc105.htm
Before using copyrighted materials in courses, USF policy often requires faculty staff and students to obtain the permission of copyright owners and it is best to seek permission to copyrighted works. However there is a “Fair Use” exemption which allows faculty to use limited portions of copyrighted material, without requiring permission for non-profit educational purposes.
The TEACH Act allows faculty to use copyrighted materials (while teaching) when that teaching is then transmitted via the Internet or video. However, to the extent possible, those materials must not be distributed in a way which the learner is able to keep those materials. For instance it would be fine to display a streaming video, but you should not allow the student to receive that copyrighted video in a format, that the students could then redistribute.
For a detailed explanation of USF Copyright Policy, review a presentation that provides an overview of copyright laws, Fair use, TEACH act etc.