"What Could've Been" was released on September 6, 2019, as the lead single for the country-pop quartet . Directed by Patrick Tracy and filmed in Franklin, Tennessee, the official music video visualizes a "split-screen heartbreak story" that explores how a failed romance might have looked if things had ended differently. Video Narrative and Visual Themes

The band described the video as a reminder to show love openly before it is too late. Song Background and Production

The video prominently uses mirrors as "memory triggers". While the band members sit alone reminiscing in a house, the reflections in the mirrors show alternate, happy outcomes of their past relationships.

The band consists of two real-life couples: Colbie Caillat with her then-fiancé Justin Kawika Young , and husband-and-wife Jason Reeves and Nelly Joy . They chose to "lean on [their] love for each other" to act out both the "before" and "after" of the broken romance portrayed in the video.