It's far from perfect, but keep up the good work :) I'll give you a 7.

@Bielie:
That won't work. You gotta use

on *:TEXT:*:#:{
     if (%flood [ $+ [ $nick ] ]) halt
     set -eu3 %Floodnick [ $+ [ $nick ] ] .
     if ($1 == !youtube)  {
          if (!$2) notice $nick http://youtube.com
          else msg $chan 3Your Youtube Search:  $$2- $+ : http://www.youtube.com/results?search_query= $+ $$2- $+ &search_type=&aq=f 
     }
     if ($1 == !Google)  {
          if (!$2) notice $nick http://google.com
          else msg $chan  3your google search: $+(http://www.google.com/search?q=,$replace($$2-,$chr(32),+)) 
     }
}