you can either search for it on youtube as "burning man livestream" or go to (and join) Camp Envy at
https://www.campenvy.com/
which will also let you send a message to be placed in the temple, which will then burn with the temple on Sunday next.
Compared to youtube or other edited and often self-obsessed videos of burningman the webcam and its operator Motorbikematt is the real deal. I think it's his 6th burn, and as a guy who has worked with NASA, set up cameras in shark tanks, and filmed blizzards in the arctic, he's a righteous character in his own right, and one who takes the rules of Burning Man very seriously. So give it a shot and catch what may well be the flickering embers of the 60s before they die out completely