Dansephoto.com :: Darcey Bussell teaches the cygnets pas de quatre from Swan Lake (actually a pas de cinq here) to pupils at the Royal Ballet School. 2006

Many Ballet videos and training on youtube

So many dancers rely on some sort of magic happening on the stage.
They never, for various reasons, work full out in rehearsal. That’s very uncreative.
They don’t discover the kinds of things that add up to a remarkable performance. - Benjamin Harkarvy

We found this interesting video on Youtube, probably the best video platform on the internet.
This is its description :
Darcey Bussell teaches the cygnets pas de quatre from Swan Lake (actually a pas de cinq here) to pupils at the Royal Ballet School. 2006