In the clip, Lorde, dressed in beige and posed by a floral arrangement on the beach, appears to be meditating until she focuses on the camera with an intense stare. The only sound is that of her natural surroundings. The video is captioned with just the word "Solstice."
No information about what this visual might be previewing was given, but for what it's worth, the summer solstice occurs Sunday night at 11:31 p.m. ET.