http://www.geocities.co.jp/Playtown-Denei/3370/SuperTec.htm
It turns out that I won't need to ask on the MK message board, I found out where it came from. It's one of the movies on this page:
http://www.geocities.co.jp/Playtown-Denei/3370/SuperTec.htm
That page has a lot of movies so I'll watch more of them and see if there are any more good ones.
Edit: I watched some more of the movies and I don't see anything else that's worth publishing, except maybe another tricks movie with a length of 2:44 which ends at 5-2 that's also pretty cool. There's also a movie that beats the game with only 500 points, a movie that shows a glitch at the end of 1-2, a movie that shows how to jump over the flagpole in 1-1, the super baka technique movie that we've all seen already, a few LoZ movies and an AoL movie that aren't too interesting, and some other movies that I haven't watched yet.
Edit 2: Bisqwit, how did you know the name of the author of warpless SMB3 movie?
Edit 3: I don't know Japanese and Babel Fish's translations suck so it's very hard for me to figure this out, but if I'm understanding correctly, the name of the game is the words in yellow, and the name of the author is the word on the right on the next line, so if I'm correct about this, then the author of both tricks movies that I submitted, the 500 points movie, and the 2up movie (the pic for these is the one that says Now Printing) is 複数人 (he also called himself TokusiN in the 2up movie), the author of the warpless smb3j movie (the pic for this is the end screen) is とくしんさん (he called himself something in the movie but it's just weird symbols so I must not have the font), the author of the warpless SMB movie (the pic for this is the princess thanking Mario) who we've been referring to as Yy is わいわいさん, and the author of the super baka technique movie (the pic for this is Mario jumping on buzzy beetles) is ドーコカラキさん, though I could be completely wrong about all of this, so maybe someone like Boco should check out that page and try to figure it out (btw, do I get an award for the longest run-on sentence ever? I hope none of you happen to be English teachers :).
