It's indeed very funny as it pokes fun at all these British-class-in-period-setting dramas that inevitably become in vogue every 10 years or so. The team of Merchant Ivory had The Remains of the Day in 1993 and then there was Gosford Park in 2001 and, of course, Downton Abbey in 2011. However, the real kicker is the appearances of Jennifer Saunders and Joanna Lumley of Absolutely Fabulous fame. All they needed was Dawn French and it would be reason for a national holiday. Then there is Kim Cattrall bringing out that "natural" British accent of hers. Remember it from The Ghost Writer? You'll wish you didn't.
The first part is the better of the two, although the second video features a gag about a staircase that had me in fits of hysteria for longer than I thought possible for such a simple joke. Then there's the jokes about the maids, the giant jug, the daughters and so much more! It curiously even has it's own page on IMDb. Watch and enjoy!
These clips did remind me of the old "Dumb Street" sketch from Fast Forward. There's even a similar joke about characters looking around confused as music plays over the soundtrack! And yes, there's some crossover with the clips below, but it's so funny you won't mind watch some of it twice.