In the introduction to that video, Liberace sez:
… his name was Charles Dawes, he was the Vice President as you know, ….
I seriously doubt if anyone today knows anything about Charles Dawes, save for the the few history geeks in school who really read their history books.
How things change in over six decades.
Not sure how many people in the 1950’s did actually remember Dawes, but I suspect a decent share of Liberace’s audience at that time did know Dawes was VP when they were kids.