To do this he had to:

Collect no coins

Obtain no power-ups

Not kill any enemies

Get to the flag poll at 0 seconds

Use all the warp pipes

The zero seconds requirement means this can't be a speedrun, and thus he's free to take as long as he likes. Makes it less impressive.

But speed runs have been done to death, its nice to see something different.

Like the guys who did Punch-Out up to Mike Tyson blind folded.

u coul've sworn they said it was 600 a few days ago

You could still speed run.  Lowest score speed run.  Lowest score is best whether it's an a hundred hours or five minutes as long as it's the lowest score.  Any tie for lowest score, the faster time has the record.

That looked really, really difficult!

I guess he could do better, he died once on the tricky jump on 8-2 (cause he had to avoid the coins).

Incredible

Very impressive. That world 8-1 wall-jump in particular demanded extreme precision.

Instead of jumping on a Goomba to cross the gap, this guy used a wall-jump, thus decreasing 100 points.