Hi Daniel,
Using other web content is definitely possible, the only trick is making sure the client computers have the appropriate plugins to display them. If you're using our player images on your computer, you won't find flash player installed (you'll have to add that).
To add some HTML content into the system (like an embed tag with a flash player), I would follow do the following:
1. Upload a new piece of ticket text for use as a placeholder. Ideally, you'll want to set the duration (in seconds) to be the length of the video... maybe add a few seconds for flash player to load. Select the desired feed as well.
2. Login to the database (I like a program like phpMyAdmin) and head to the content table. Look for the ticket text entry you just added, it's probably near the end. Edit that row.
3. Change the following fields:
-- content: Put the HTML in here
-- mime_type: Set this to text/html
-- type_id: Set this to 3, or whatever number corresponds to the Graphics type in your Type table.
4. Save the changes to that row, you should be all set.
If the duration you set during step 1 isn't long enough, you'll want to change that on the feed_content table keeping in mind the the numbers you see there are millisecond values.
Thanks,
~Brian M