It's not bad at all actually. I'm from Yorkshire, it's clear he's lived here a bit. Have to say though, I tend to try not to sound so broad! Lighter accents always sound better to me, and I've never been a huge fan of how people around me in Sheffield sound.
There was a thread on DS, in general discussion recently about the worst accents in the UK. Sheffield or even any of the Yorkshire accents if I remember rightly, weren't on the list, but I do remember thinking most of the accents on the list can sound so nice if they're light.
For example, Cardiff, Newcastle, Birmingham and Liverpool and I think Belfast were on the list. They're all accents that can sound extremely attractive (to me) if the girl has a light accent. Made me think any accent is good if it's light. Off topic