Get Thrashed (2006) on Netflix

Plot summary

Thrash metal takes shape in the early 1980s, when Metallica, Megadeth, Slayer, Anthrax and Exodus, among others, push heavy metal in a harder direction. The film follows the crowds that gather in Los Angeles, in California's Bay Area and in New York City, and the worldwide following that grows around the sound. Members of the bands, along with the fans who were there, describe the making of the music and how shows that begin at backyard parties turn into arena tours. It also covers the style's influence on grunge and nu metal and the artists who keep the sound alive today.