It Takes Over One Hundred Cellphones To Propose Marriage Properly

I sent this video to a fellow and told him "If you ever propose to me, please do this." Either he's currently fleeing town or he's gathering up about a hundred cellphones and figuring out how to recreate this trick.


Okay, SOmeone explain to me how the entire video is spoken in what appears to be Japanese yet the phones spell out "I heart YOU" in English.