Confetti fountain, 2 clips, Use it as over-layer with blending mode (add, screen, lighten…) like the example in preview video.

Stock footage videos used in this video preview are not included, but you can buy here:

http://videohive.net/item/on-stage/6581231 and

http://videohive.net/item/empty-stage-wide-2/2616552?s_phrase=THEATER&s_rank=23