Defenses to a Claim of Copyright Infringement

The video tutorial discusses various defenses against copyright infringement claims. It covers invalid copyright, valid license, statute of limitations, unknowing infringement, public domain, and fair use as potential defenses. Each defense is explained with examples, highlighting how they can be applied in different scenarios. The fair use doctrine is particularly emphasized, detailing its application in academic, news, and comedic contexts.

Describe the significance of the public domain in relation to copyright.

How does the extent of use affect the determination of fair use?