It's hard to imagine a Nirvana without Dave Grohl bashing away behind the drum kit, but footage of the band in their early days has just been unearthed.

It sees a 20-year-old Kurt Cobain, along with bassist Krist Novoselic and Melvins drummer Dale Crover - who played on their first demo, recorded the day before this footage was shot - playing an empty Radio Shack store in their hometown of Aberdeen, Washington.

Grohl, of course, joined the band in 1990, after they had released their debut album 'Bleach' in 1989.

Watch the rough yet engrossing footage below: