Nope, it's not the first Christmas lights of the season: this video is by NATS (National Air Traffic Services), which deals with 1.2m flights arriving and departing from the five main London airports each year.
Every airport in the video is given a different colour, the video charting the daily flights of each airport, before throwing them all together into a colourful cacophony — and proving just how busy it gets up there.
Impressively, 99.8% of these flights experience no air traffic control related delays.
Behind the razzle dazzle video, there's a serious message: for London's 3,500 daily flights, there are just six runways. And that's set to cause problems in the near future. Says Paul Haskins, general manager for strategic delivery at NATS:
"Traffic levels are set to return to pre-2008 highs by 2020 so we have to act now to avoid the advent of spiralling delays and congestion."