“Long Live Rock” was completed a few years ago, initially intended to be a summary of the hard rock lifestyle as experienced by the artists and the fans. Director Jonathan McHugh (“Cosplay Universe,” and also a soundtrack producer on “Mortal Kombat: Annihilation”) gets into the mess of it all with those heavily involved in these united worlds, collecting interviews from participants and footage from rock festivals, delivering an overview of dedication to a sound that some have suggested is no longer a dominant force in popular culture. However, in our pandemic world, “Long Live Rock” serves a different purpose in 2021, offering a look back at a time not too long ago when tens of thousands of people would gather in large spaces and pack together as tightly as possible, releasing something primal as a community, sharing the music and air in a way that isn’t possible right now. Read the rest at Blu-ray.com