Mood: The mood of the video appears to be lively and energetic, with a sense of playfulness and youthfulness. The theme seems to revolve around social media, relationships, or a lighthearted romantic comedy, given the title 'HASH TAG' and the presence of a man and woman in a vibrant setting.

Environment: The environment appears to be a nightclub or a party setting, with a purple-lit backdrop that suggests a lively and vibrant atmosphere. The presence of a man and woman dancing or posing suggests a casual, social setting where people are letting loose and having fun.