IL Leaderboards for Sonic games are hosted on the sonic center. For Rush specifically http://www.soniccenter.org/rankings/sonic_rush

The Sonic Center is ass and doesn't show actual videos. Most people use IL boards to learn levels.

A minute of looking at the left side of SaimeZX's link has a link to 78 IL rush videos. Be glad you have those, as back when I was learning ILs, there were only like 20 lol.

http://www.soniccenter.org/videos/sonic_rush

So this changed now???! Also why aren't the boss levels called "Act 3"?