Place on a movie in terms of images or image sets?

Ive been doing some research the last few days and it would appear, that some sites have a pretty steady ratio of images > movies when it comes to the types of content located in their members areas.

So i was wondering, if you had a 30 minute movie, how much still/image content do you think it would take to make up for that movie if you were to remove it from a members area and, where do you think the point of to little vs. to much comes in to play?

Regards,

Lee