Go back to my image in page 3. You have

A) Yoshida's explicitly mentioning XIV only.

B) Your quote already says, and I bold: " You may record and share your performance of the FINAL FANTASY XIV original score excluding the songs entitled “Answers”, “Dragonsong” and “Revolutions” or original songs and/or melodiesusing the performance actions in accordance with this Agreement."

C) Screenshots of takedowns issued by Square Enix Co.,Ltd.

And you still want to believe there's some sort of misunderstanding?

There's none, that's their stance, they don't want you uploading anything that is not FFXIV.