Gonna be honest and 100% unprofessional I don't know much about licenses but as you don't resell it or redistribute it in anyway you can edit it and use it as you like.
Viewing post in TDRPG - Dungeon - Pixel Art Top-Down Tileset comments
I had the same issue. This might be helpful. Licenses are important as they protect you and the people using your stuff!
https://creativecommons.org/choose/
Yeah, you can use it commercially as long you don't used it in a way that redistribute it in raw.
For example: you can use it in games/videos., but you can 't create a map creation tool that gives the person the raw file of the tileset in a way that they can use it outside your tool without having to pay for it themselves. Is that clear?
For games and videos you can use it, edit it, and do whatever you want.