The DMCA might restrict faculty's ability to make copies of material if circumvention/decryption is involved. Some screen-capturing technology may or may not use circumvention measures.
Title 1 of the DMCA covers anti-circumvention and technological protection measures (TPM) that protect digital intellectual property.
By law it is illegal to circumvent or decrypt these protections, even if Fair Use permits your intended use. It is also illegal to manufacture and to traffic any technology or service that is designed to circumvent a TPM. (Section 1201)
The DMCA also prohibits removing the copyright management information contained on a copyrighted work. (Section1202)