This is a Mega Man game that was not developed by Capcom, but rather by Stephen Rozner of Hi-Tech Expressions, who did all the design, programming, graphics, and sound. The game is infamous for its mediocre quality.
In this run, Sand shaves 36.61 seconds off the previous movie. The majority of the savings come from a glitch that allows most of Volt Man's stage to be skipped. Other improvements include better movement throughout the stages and faster boss fights.
This game runs too fast on anything more modern than a low-end 386 or so. As such, the encode is technically correct.