A similar but much more up-to-date and interactive version of this can be accessed via the Global Fishing Watch map: https://globalfishingwatch.org/map

Turn on the `Vessel presence` layer, which displays a vector-tiled view of all vessels up to a few days ago, not just fishing boats.

And something from my own blog which may be of interest: https://blog.datadesk.eco/p/sky-lapse-in-two-tone