Ok, so it looks like the metadata itself is sorted out. Now you need to add an elevation source.
You can add an elevation source to the map, using Map->Add Data dropdown->Elevation source.
Alternatively, you can run the multiplexer with a data source, by adding an elevation source into the Digital Elevation Model box. Since your video takes place mostly over the ocean, you could also just type 0 meters into that box.
Note that we don't really have a way to deal with tides at the moment, so that's something to keep in mind.
-Nick