This action provides a more generic step for your workflow that will work with videos. Just select the playlist you want the files to be added to and it will do it for you. It can also create the playlist if needed.

The action will return the list of iTunes tracks that were created.
To use it, download the following package:
and install the action file in your ~/Library/Automator/ directory.
This action was inspired by an hint from MacOsXHints.com provides a basic applescript.
There are some subtleties in transferring this script to an action to fetch your list of playlist, support non English localisations and work with folders. Check out the script code if you want to learn a bit on how to implement complex applescript actions. If there is the demand for it, I might make a tutorial out of that.
The file is localized in French, English and Italian, if you want to make other translations, just let me know.


