Today you get four long videos about fireworks. The above is an episode of Nova from PBS on the history and chemistry of fireworks. I fully assume that I'll have to refind it eventually because Nova tends to be pretty good about deleting their episodes from YouTube when they're posted whole like this.
The next three videos, on the other hand, won't go away any time soon. They're lectures published by the chosen institution and explaining - while mixing in indoor-appropriate demonstrations for the attendees.
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