I made 3 videos (animation) ads with the same content (graphics, photos, colors, text) but with different aspect radtio (vertical, horizontal and square). Should I buy 3 music licences (one song) or I need just one licence?
Hello,
Though “different aspect ratio” is not specifically mentioned in the license terms, it most likely would fall under the “variation” policy which allows a single license to cover translations and cut-down edits. You can read about it here.
I’m pretty sure you’re safe using a single license for the same content but with different aspect ratios, but you can also ask support for confirmation.
Hope it helps 
Thank you!