Rock Brigade Community Forum has uploaded some rare Pyromania-era footage featuring the late Steve Clark on guitar. The most interesting once is the first one where Def Leppard lip-synched “Photograph” and “Rock of Ages” on the famous American TV show “American Bandstand. Check out the three parts (each over 20 minutes) below.
https://www.youtube.com/watch?v=Xz3GWYubuX8 
https://www.youtube.com/watch?v=aKq78P5JchA 
https://www.youtube.com/watch?v=QJ9JRAjmcR8