Because I am a stupid person, here's what some guy said:
If you watch both videos, you can notice alot of similarities, Gaon in the forest, and Eir Surrounded by petals.
It seems very alike except a few scenes from Tales of Destiny's video
I really don't see anything that would indicate ALLM stole anything. The only similarity is the prairie scene, and even then that's pretty cliche on both their parts so I doubt it was plagiarism as much as it was un-originality.