During the Swedish show, the national public broadcaster, Radio-Canada, has experimented a drone-based device to achieve a live broadcast of an event through its Facebook page.
That was a first experiment and several things didn't work well (no sound, lack of stability with the live transmission, etc.). Nonetheless, if you want to watch, click here:
http://ici.radio-canada.ca/regions/Montreal/2016/07/27/002-feux-artifi ce-montreal-coulisses-loto-quebec-parc-jean-drapeau.shtml
For this special event, the Web team of Radio-Canada also did a 43-minute behind-the-scene report of the Montreal fireworks competition. It is available on the linked page, just below the drone broadcast video.
Fred