A new Bruce Springsteen documentary feature offers an inside look at the ‘Tracks II’ Box Set’s “Lost Albums,” and includes previews of previously unheard songs.

Messy, overheated, self-indulgent, divisive, and literally seminal, Metallica’s 1996 album lacked only a colossal 301-song, five-LP, 15-CD, four-DVD box set reissue.