Based on the story by manga master Leiji Matsumoto (The Cockpit, Queen Emeraldas), the 55 minute featurette picks up one year after the events of Galaxy Express 999 in which a young boy named Tetsuro and his motherly companion Maetel worked to rid the universe on the Mechanized Empire who had taken over Earth.
GoGoAnime is the best site to watch
Galaxy Express 999: Eternal Fantasy SUB online, or you can even watch
Galaxy Express 999: Eternal Fantasy DUB in HD quality. You can also find
Toei Animation anime on GoGoAnime website.