Mood: The mood of the video appears to be light-hearted and playful with a hint of mystery, as indicated by the title 'Detective Byomkesh Bakshy'. The theme seems to revolve around detective work, possibly with comedic elements. The overall emotion evoked is curiosity and anticipation.

Environment: The setting appears to be on a public transportation vehicle, likely a bus or train, given the wooden interior and the metal pole the man is holding onto. The environment seems to be urban, possibly in India, given the context of the video being in Hindi.