Just FYI - we have released our 'film viewer' with the new collection view OSD provides integrated into our app. Check out a sample at: https://familysearch.org/search/film/101110053
. This shows 2000 images, and we have tested it with quite a few more. The initial load is using the fixed JPG files and when you click on an image we swap it for the deepzoom image. OSD is rocking for us!