It would need to be a combination of fun and educative contents focused on forum discussions. I'll love to see a voice over discussions of some forum discussions, with possible animation edits to bring them more to life, that way people would be entertained and may want to head to the forum to join the conversation.

Maybe also a weekly interview with one forum member, although this ma be a bit more difficult for privacy reasons, users may not want to go through the stress of ensuring no one can trace their identity through such means.