I did some digging last time this was posted
And found that they're called Girandolas. Luckily someone's already said "Needs more GoPro".
epicfireworks.com/blog/2014/08/video-of-camera-placed-inside-a-girandola-firework/
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tarka_dall Like normal dall, only a bit more spicy, Sun 30 Apr 2017, 22:43,
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