Arcade shed runs on postnuke CMS using the plugin for it PnFlash games (http://www.pnflashgames.com/). you can get games automatically installed using a subscription service on there site which allows you to just hit install in your admin panel that will do the rest for you.
Currently it has over 200 games installed.
As it uses post nuke then you can easily add a lot of other modules like videos etc whatever is available at postnuke site
The site gets a steady 20-30 uniques a day for the last 2 months.