Apparently realizing his mistake, Fraternidade Crypto ended the stream, and says he tried to relocate the crypto to a new wallet. It was too late, however, and someone watching had already taken the around 86,000 MATIC (~$50,000) and various NFTs in the wallet.
Fraternidade Crypto posted an emotional video after the fact, explaining that the stolen funds were his life savings. He said he planned to file a police report, and also offered a reward for the return of the funds.
Fortunately, he was able to recover the stolen MATIC, though he says he has not been able to recover the NFTs, which have "incalculable value as they are NFTs, estimated value of approximately 15k dollars still lost".