Paging custom fields results

Hi,

I have a post type that is manipulated with magic-fields plugin. The post has a category called artist. In this post there is the possibility of editing 6 text fields to show videos.

In my website I have a page called media. This page basically lists all videos from posts belonging to category ‘artist’. If first artist from query result contains 6 videos, then the list will have those 6 videos showing first and then continuing with next artist/post. The page shows only 12 results, therefore a paging is required. Problem is that I can’t page artist post query because the result depends on how many videos each artist has.

Can anyone help me on this issue?

Thanks
Peter