The Ben Winston video for You & I (pre-released 18th April, due for release 25th May) has a melancholy feel that is almost Jungian (insofar as I understand Jung and his theory of synchronicity): https://www.youtube.com/watch?v=_kqQDCxRCzM
The end of a pier with the tide going out.
The end of youth (comparatively); the end of the initial phase of their success (unless they can reinvent themselves); the end of a relationship with a fan base that is already looking for more tangible forms of romance.
Even the half-blown balloon fizzling out somehow seems symbolic.
The lyrics are delivered in a style of self-aware deliberate denial of the implicit obvious.
Artistically it's a masterpiece. Not that many people are going to look at it seriously. To most people it will just be flim-flam.