Mood: The mood of the video appears to be romantic and upbeat, with a focus on love and relationships. The use of pastel colors, hearts, and smiling couples creates a lighthearted and playful atmosphere. The theme seems to be a celebration of love and promises, with the title 'Promise of Love Mashup' suggesting a blend of romantic songs.

Environment: The setting of the video seems to be a mix of different outdoor locations, possibly with a city or urban backdrop. The images of the couples suggest a casual, relaxed environment, with no clear indication of a specific location. The overall aesthetic is bright and colorful, with a focus on capturing the joy and intimacy of the couples.