Mood: The mood of this video appears to be spiritual and devotional, with a sense of calmness and serenity. The use of a dark blue background and the trident symbol suggests a connection to Hinduism and the divine. The overall theme seems to be one of reverence and worship.

Environment: The setting of this video appears to be a studio or a controlled environment, with a plain dark blue background. The presence of a trident symbol and the text 'Mahamrityunjaya Mantra' suggests that the video may be related to a Hindu temple or a sacred space.