Quote by: beeweeSimply install the Autotags plugin, it has a preconfigured youtube tag. I'm content manager of several quite large site running Geeklog, and this plugin is my forever favourite since it saved me so much time.
It is a great tool. A plus for using the autotag plugin, is you will not half to edit the stories as you can make the autotag name the same as the youtube plugins autotag.
One of the Geeklog Core Developers.