Get over to BangerTV and support the community and channel. Everything Metal from History to Emerging. There is a Doco on Extreme Metal that is real good and if you can find it Sam Dunn has a Doco “A headbangers journey” about the history of metal and how we have so many sub genres. It’s wicked.

P.S. all these recommendations are awesome. I’ll put my hat in the ring for Decapitated & Phobophilic. Maybe Behemoth (The Satanist album).