&fmt=18

A magic code used on YouTube to make videos appear slightly sharper when added to the end of the video url.

I've been watching YouTube videos with the "&fmt=18" code; now it hurts to watch them without.

by Sinkbot June 2, 2008

&fmt=18

Makes video and sound quality a lot better on YouTube, but once in a while does the opposite or no improvement.

"&fmt=18" is awesome.

by Penis-Muncher2 March 22, 2009