Mood: The mood of the video appears to be upbeat and entertaining, suggesting a lighthearted and engaging tone. The theme seems to be a compilation or a countdown of popular content from 2018, likely a music video or a playlist.

Environment: The setting of the video is likely a digital platform, given the presence of a jukebox and HD video labels. The environment seems to be a vibrant and colorful space, possibly a nightclub or a festive setting, based on the images of people in party attire.