How Did They Do This? Masking??
On this exceptionally well done doc, at the 6:53 mark, there is a locked, time-lapse type shot that occurs. The first shot is the cruise ship sailing out of port, then the background fades, but not the foreground, and the background crossfades into the open ocean. Do you think they applied a mask (rotoscoped) around the foreground objects and then just did a simple cross fade? Whatever they did, it is a cool effect. I love the variety of angles they got and it looks like it shot with a Brandon Li type of gimbal set up. All moving shots look nice and smooth and the whole piece is well edited. The music is quite well chosen too.