Mood: The mood of this video appears to be energetic and lively, with a mix of vibrant colors and dynamic images. The theme seems to be a mashup of different music styles or dance performances, given the title 'Smashup'. The overall emotion evoked is excitement and playfulness.

Environment: The environment appears to be a mix of indoor and outdoor settings, with images of people dancing, performing, and socializing in various locations. The settings seem to be glamorous and celebratory, with bright lights and colorful costumes.