using Twitch

[KisaiTenshi]

It isn't uncommon for many twitch streamers to have non-FF music playing in the background while they stream ff14 due to a !songrequest feature, so I think you would be ok in that department. Now if you uploaded ff14 footage without using the original music to YouTube or other places, then I think you would have a problem.

Got ya, so it's just recorded video. I was teh derpin' and misinterpretin'.

Thanks for the clarification. ^^

The intent behind that policy is the same intent behind trademark infringement. Certain tracks (like the FF overture, The 9-note Battle-win melody) are specific to final fantasy, and anything else using it (outside of a parody) would intentionally be trying say they are related to the franchise.

The reverse of that situation is removing the music from the game and replacing it with other tracks that to insinuate a relationship that isn't there. For the most part, this is a problem on Youtube because the ContentID matches things as short as one sound effect (like Mario Jumping.) So in the case of Twitch, playing that one mario sound effect may mute the channel for half an hour. Thus making the stream completely useless.

So if you want to be safe, you don't replace the in-game music. Also of note:

You may not materially alter or modify the Materials, except:
You may add your own voice-over, and you may edit, combine, mash-up, mix and match the Materials with other FFXIV Materials;

and

Guidelines for Music and Sounds
You may only use music as it is incorporated in FFXIV;
When showing gameplay, you may not replace the FFXIV music with third party music;
You may not play FFXIV music alone (i.e., without accompanying gameplay footage), or with third party materials;
You may not use the songs titled "Answers" or "Dragonsong."

So the policy itself is a bit self-conflicting. Yes you can use the music, but only how it's used in the game, and can't be used separated from the game. You can't use "Answers" or "Dragonsong" which means you can not stream FCoB T13 with the music on.