Hi, few free HD files, may be useful:
http://cutestockfootage.com/stock-video/wall-of-fast-flashing-lights-concert-9657.html
http://cutestockfootage.com/stock-video/small-wall-of-flashing-lights-9644.html
http://cutestockfootage.com/stock-video/wall-of-flashing-lights-9645.html
http://cutestockfootage.com/stock-video/shaky-sky-timelapse-9694.html
https://www.youtube.com/watch?v=QvGOobTeTO8 https://www.youtube.com/watch?v=wkzV9fC4j_M
http://cutestockfootage.com/stock-video/wall-of-fast-flashing-lights-concert-9657.html
http://cutestockfootage.com/stock-video/small-wall-of-flashing-lights-9644.html
http://cutestockfootage.com/stock-video/wall-of-flashing-lights-9645.html
http://cutestockfootage.com/stock-video/shaky-sky-timelapse-9694.html
https://www.youtube.com/watch?v=QvGOobTeTO8 https://www.youtube.com/watch?v=wkzV9fC4j_M