They are really good and if you read the comments after that video and some others (on youtube) you'll see some people thought it was FM and that the drummer was Mick Fleetwood.

I think "Tribute Band" really does it for them rather than a cover band because they've really modelled themselves on FM and worked really hard to do things the same as FM. Mick Fleetwood commented:-

'An extraordinary emotive performance of Fleetwood Mac' (Mick Fleetwood)