Everyone knows Elvis is not really dead, he's an alien,. 
No he's not. And he wasn't abducted by aliens either. He just chose to go with them...
Ok, contemporarily that video clip isn't anything special. Several guys member to this site could do it at home. I remember when i was a kid though a show that was on TV on Saturday nights. It seemed late but who knows what time it actually was. I was seven or eight or nine so we're talking the late 1960s.
The show was rematches of professional boxers from different eras. Black and white footage primarily. It'd probably look hilariously bad today but at the time it was the most amazing thing. Remember best one fight with (then) Cassius Clay and Rocky Marciano. Both in their primes in the ring together. Marciano won the fight by knock out with body blows. Just pulverized the young and thin Clay's ribs and chest.
I'd really like to know how that footage was done in its day. It was a cool thing to watch in its time.