Technically, Can were crappy for longer than they weren't
Painfully, horribly true my friend. The were flawless between 1968 and 73, then a little ropey with the odd flash of brilliance, then pretty dire. But they did put out at least six (Delay to Future Days) consecutively amazing albums and so navigate themselves out of the crap zone.
The DVD? it's out alright and that's even more of Peter Green/Stevie Nicks knifedge, some wonderful longhair freakout moments (Can Free Concert), a deeply disturbing German TV clip of them playing (shirtless - not pretty) over an early chromakey experiment, worryingly glam later concert footage and scads of pointless filler. Tread carefully.