Mood: The mood of the video appears to be nostalgic and melodic, evoking a sense of heroism and romance. The theme seems to revolve around a collection of songs from a movie or a musical project, likely a Bollywood film given the title 'Ek tha Hero'. The overall emotion conveyed is upbeat and celebratory, suggesting a jukebox or a compilation of popular tracks.

Environment: The setting of the video seems to be abstract, with a watercolor-style background that evokes a dreamy, ethereal quality. The environment does not appear to be a specific physical location but rather a creative representation of music and emotion. The presence of clouds and a soft color palette suggests a lighthearted and airy atmosphere.