This is a silly discussion that distracts from the real issue (humans being tortured), but here you go:

https://www.justice.gov.uk/downloads/offenders/psipso/psi-20...

"2.1 Showing films on DVD or video to groups of prisoners or staff, either in communal areas or via in cell television systems, is considered to be a public performance for which a licence is required."

This is the UK version, be my guest to search for the U.S. equivalent before making any further claims.