Seems it doesn't work anymore. mIRC ver 7.27 if that's relevant.

Doesn't seem to respond when there is anything written after the link.

[21:49:48] <@user> http://www.youtube.com/watch?v=7kuUHEyCV9g
[21:49:48] <&bot> YouTube Maximum Destruction DOUBLE BACKFLIP ENCORE http://youtu.be/7kuUHEyCV9g
[21:50:01] <@user> test http://www.youtube.com/watch?v=7kuUHEyCV9g
[21:50:02] <&bot> YouTube Maximum Destruction DOUBLE BACKFLIP ENCORE http://youtu.be/7kuUHEyCV9g
[21:50:08] <@user> test http://www.youtube.com/watch?v=7kuUHEyCV9g test test
[21:50:17] <@user> test http://youtu.be/7kuUHEyCV9g test test
[21:50:30] <@user> :<

Though responds perfectly fine to anything as long as the link is last.

Flawless~
Thanks :)

works awesome, but got a weird response from it:

[14:07:47] !calc 10m in feet
[14:07:47] 0310 meters = 32.808399 feet (32 feet 912^453⁄\x3csub\x3e64\x3c/sub\x3e inches)