Not all that impressive for a game today, but this was basically unheard of in the 1980s and it explains how the movements were so smooth.
If you’ve played it a decent amount of times, you will recognize every movement in the live action video as it looks in the game.
Also, for those who don’t know what rotoscoping is: https://en.wikipedia.org/wiki/Rotoscoping
Mortal Kombat came later. In 1992. Prince of Persia came out in 1989 and, as it showed, was in development starting in 1985.
This just did not happen in the 80s.