Mood: The mood of the video appears to be melancholic and introspective, with a sense of longing or contemplation. The theme seems to revolve around heartbreak, love, or self-reflection, given the title 'I KNOW' and the artist's somber expression.

Environment: The setting appears to be outdoors, possibly in a park or a natural environment, given the blurred greenery in the background. The focus is on the artist, suggesting that the video could be a music video or a lyrical video with a focus on the artist's performance.