As I was drinking my tea watching this a second time I thought, hang on, in best pareidolia fashion: This is surely "His Noodliness." None of the lame "visage on a bit of charred bread" for him, this is a 3-D realtime manfestation :D
Very. Mercury Thiocyanate, so you have mercury compounds coming off in the vapors.
This used to be sold along side fireworks in little pellets (called snakes I think). They were considered a "safe" alternative to fireworks... and gave off highly toxic fumes. I don't think they sell them anymore.