Ronnie James Dio performing "Rainbow In The Dark" on a US late night television show, "The Rock Palace." I believe this was recorded very shortly after the release of the "Holy Diver" album.

From the same show, also see:

Stand Up and Shout
   • 1983 Ronnie James Dio  "Stand Up and ...  
Man On The Silver Mountain
   • 1983 Ronnie James Dio  "Man On The Si...