You can modify it as you'd like and use it for as many projects(games/videos) as you'd like, commercial projects included. Attribution appreciated but not required.
The only thing you can't do is redistribute it in a way another person could just grab that and use it for their own projects. For example: you can't make a standalone map editor and include this asset, but if you're making an map editor tool for your game and you'd like to include this asset(because it is used in the game itself), you can but you'd need some sort of way to encript the raw file so that way it's only accessible through your map editor inside your game.
Let me know if anything isn't clear, I'm still trying to figure out this whole licensing stuff haha