This movie is a full warpless run-through.
It is about a 2 second improvement over the previous movie by adelikat, klmz & andrewg. Most of the improvement comes from a new "shell glitch" that makes Mario decide to ignore the castle and instead rub sensually against the flag pole's support.
For more information, it is encouraged that you read the author's comments.
Be sure to check out the video of a real NES playing back this movie.