FAKE - WGNA-TV (now KHTB) Commercials and Sign-off with 1980 sign-off background and message (1988) 

The most well made sign off video I think?
Has the SSB films from WBAF (with rooster cooking included since 1960s); KLRN (1988-199?); Updated Homecoming SSB (1986); US Navy Guard Piano SSB (1979-1985); American Revolution SSB (1968 until 1992 I think?); Sierra Club SSB (1972-2005 when WOKR ended broadcasting for 24/7) and Mississippi SSB (1989-94/95).