This time beats the current world record at time of submission by 2 seconds, originally by Japanese player Worm. I'll just do a quick level by level overview for levels that have anything to mention, if I leave it out the level went fine and nothing was wrong.

1-3: If you get a perfect climb up the little stair pyramid then you can get a 362, but all of world 1 went pretty well and standard.

2-1: I got the flower immediately, but on this world it isn't needed at all because you can simply do a different jump pattern at the beginning and not lose any time without taking a hit.

2-2: I meant to get running speed before jumping after waiting on the seahorse, lost an in-game second there.

2-3: I didn't do the flashy mushroom walk because if you do it wrong you can lag the game, and there's no sense losing time in an autoscroller.

3-1: Probably the best 3-1 I've ever had (given these strategies, I forgo the second boulder skip for consistency, it's much harder than the first and saves less time).

3-2: My extra mushroom/damage boost tradeoff is nearly identical in time to the existing strat in the best video seen and much much easier.

3-3: I don't do the platform waiting skips because it is multiple frame perfect tricks in a row :/ They look really cool though.

4-1: Worst level in the run, starting with missing the flower. The bounce on the koopa is not something I wanted either. Disgusting fall on the bullet shooter as well, so 2-3 seconds able to saved in that level.

4-2: Got hung up on the little brick on the floor, forcing me to wait on some things that I might not need to wait on.

4-3: Faster mashing could maybe save .5 - 1 seconds on the boss. My playing around in this level and getting hit on the guy while missing the mushroom really had me nervous but I pulled through.