Mood: The mood of the video appears to be contemplative and introspective, with a sense of melancholy. The theme seems to be related to thoughts, emotions, and possibly heartbreak or longing. The use of the phrase 'Train of Thoughts' suggests a journey of self-reflection and exploration of one's mind.

Environment: The setting appears to be a train, likely a mode of transportation that provides a sense of movement and transition. The interior of the train is dimly lit, with a window and curtain visible, suggesting a sense of confinement and isolation. The overall atmosphere seems to be calm and quiet, with a focus on the protagonist's introspection.