Calling Final Fantasy: Legend of the Crystals a sequel to FFV is somewhat deceptive. While it did follow the events of FFV, and was relatively loyal to the game, it wasn't produced by Hironobu Sakaguchi or anyone else officially associated with Final Fantasy. It's not actually a game, by the way, but rather an anime split into four chapters: Fire, Wind, Dragon, and Star. The cover specifically says "based on", so while it is a sequel, it's not an official sequel, per se. Or, at least not in the sense that FFX-2 and the different parts of the Compilation of FFVII are sequels.
Some information on FF: LotC can be found
here. Just enter the segment designated "LotC."