From a snippet and a tweet, and now this chanting Will asked for in The Old Market show, we think the song is called "You're boring yourself, and we already have the following lyrics: "Tell me, what does your heart say? [...] In sickness, in health, you're boring yourself!" I'm super excited for it to come out! :D
Update from the future: it will be on their album this year I am 75% sure and it is called from the video with the chant "I look good when I'm sober" I know this because they released a 50 second teaser on their youtube and it had the line, "Tell, me what does your heart say?" In the course from your following comment. So the chant would probably be in the rest of the song.
