Amazing 4k Slow Mo BonFire/Campfire | 2024 Summer Solstice Celebrations Germany (Slow Motion)

The colour of this fire was amazing and even better in slow motion. I added background noise from the event on top of the original fire video to give it a more dramatic effect.
Does anyone know what he added to the fire to make it go multi-coloured?
I think it was Unicorn dust! lol (let me know in comments) was it a liquid or powder?
SUMMER SOLSTICE 2024
Celebrating the Sumner Solstice in Germany with the traditional fire, food and drinks.
The German people have been very welcoming.