This is the 4th published movie in a category of impressively fast Super Mario World TASes. It beats the game by jumping to the credits from one of the two levels available from the start, Yoshi's Island 2. This happens because a glitch involving eating a Charging Chuck allows manipulating the code being executed by the game using only controller input.
This run is 00:00.17 seconds faster than Masterjun's previous movie. This improvement comes mostly from kicking the green shell forwards by touching it while Yoshi is ascending instead of eating it after spitting out the fireballs, which allows to spit out the fireballs much further before getting the green shell.
For more movies like this, see this list of TASes that execute arbitrary code.
Using a similar glitch, Masterjun has also used mere controller input to embed his own games into Super Mario World itself.