This is the third timeattack of Mega Man 4 by Kopernical.
(ＵＳＡのロックマン４)

It improves the second version by 1 minute due to lots of minor optimizations.

Curiously, whereas the previous version already looked very good, this movie has a few minor things that could be done better.
Regardless, it's a relatively great improvement so it deserves to be published as is.