If that frame were mine I'd cut off the top tube and dress it back in similar fashion to that show in the Brodie video. Look for cracks in the head tube as unterhausen suspects after the metal is clean. If it looks okay, then the light is green to replace the tube. I think the frame alignment should be checked and adjusted before mitering the new tube. After that though, it's a fairly simple matter to install a new tube. Steelman frames are cool so to me it would be a worthily project.