How in the world is the warp done from level 1 to level 4?

I'm not sure. Try making a forum post on speedrun.com/cm/forum and seeing if you get a response

Considering how simple the trick is, I can't believe I was the first person to find it.

Lol, There was no guides so I had to figure it out on my own, but it is worth 4th place out of 4 people

Hey, DT, what happened to your run videos?

I removed them because I do do YouTube and I got a copyright claimed by Nintendo, I still have the runs in my hard drive.

The music was from SMB 3