In this video, Julianne Chung (Yale University) explains the philosophical concepts of truth and validity before going on to illustrate how truth and falsity, as well as validity and invalidity, can appear in various combinations in an argument. She then introduces the concept of a sound argument (i.e., a valid argument whose premises are all true) and presents one reason to think that valid arguments with false premises are also of interest. For more detailed discussions of validity and soundness, please be sure to have a look at the videos on these topics by Paul Henne (Duke University) and Aaron Ancell (Duke University), respectively.
Truth and Validity
University of Louisville