Loads of Dennis Potter stuff - including the wonderful Karaoke and Cold Lazarus, in full - are up on Youtube, on 4oDDrama's Channel. I could spend hours watching it, but I'm meant to be off out. So, later. But anyway, I thought I'd bring this to folks' attention, because in the absence of a DVD release it's the only legitimate way to watch those two classics.
(Indeed, across the 4oD channels there's a load of fabulous stuff.)