Hi, just dropping this here to let you know.
The latest version of March 17 doesn't work for me. For some reason, neither +ytdetect nor YouTube links seem to correctly activate the script (or its "on TEXT" part respectively), but there are no error messages whatsoever.
The older one I've been using still works just fine (though it only does so correctly with %LinkDetectorForYoutubeChanList set to # but not with single $network#$chan entries. I've tried either way as well with the newer version to no avail). The date on the working script's file says December 14 2012.
@FordLawnmower - It'd be cool if you could add two things:
1) "on ACTION" and "on NOTICE" (both utilizing the same formatting as "on TEXT")
2) a variable in the top section, to have a single spot to toggle between msg and echo
Thanks for maintaining this script ;)