Mood: The mood of the video appears to be professional, yet conversational and enthusiastic. The theme seems to revolve around a behind-the-scenes look at a film or project called 'The Bengal Files', with a focus on the creative process and collaboration between the music director and the writer/director.

Environment: The setting of the video is likely on a film set or in a studio, given the title 'On Set Off Script'. The environment seems informal, with the two individuals appearing relaxed and engaged in conversation.