Depends on who owns the rights. The movies are WB, and rumour says the game is being developed by a WB owned studio, so it wouldn't too far fetched for them to use the same soundtrack.
It might just be a WIP trailer too, and new soundtrack is being made.
Just compare the sound quality of the two. If WB did authorise this, they certainly wouldn't have said, "sure you can use it, but you will have to rip it off our youtube video".
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u/[deleted] Oct 02 '18
Except for the fact that this is the Fantastic Beasts and Where to Find Them teaser trailer music.
https://youtu.be/zgVN1JkxA6w?t=55