The way I do when it comes to starting a new club, I always come up with a few discussion topics in advance. Favorite Video, favorite moment, favorite everything. Maybe start off the club with a simple "have you seen the latest video?" that way when people want to join the club will start off with something to discuss about. I just came up with a few ideas for you, but you gotta dig deeper if you want this club to last. If you can't come up with anymore, it is more likely that the subject title is a bit too narrow.
Also, reading the resource guide helps too. All clubs must have the four key elements in order to be approved. Title, intro, rules, membership. Don't hesitate to ask anymore questions if you are still confused, here or send me a message. :)