The Isango Ensemble - Stephen Lowe's Ragged Trousers at the Hackney Empire

Last Sunday I went to Hackney Empire in the rain to see the Isango Ensemble in Stephen Lowe's Adaptation to The Ragged Trousered Philanthropists and I've been wondering since then what it is that makes that company so good?
Stephen Lowe has reworked his original adaptation. It's now about a group of South African workers building a new cinema for their white boss during the apartheid era.  In the first half we see them at work and in the second, darker half they have to perform a concert for the whites.

                                                                       
Okay.  What's so special?  They can sing, dance, move, act amazingly. Every harmony is pitch perfect.  Every routine has been worked on with a rigour and discipline that gives them real freedom.  The whole company can turn on a sixpence.  They are a true ensemble.

They have passion.  They have belief. They are self aware, self depreciating, witty.  They burst with confidence.  There are no weak links, no small parts, no small performances. And they have Pauline Malefane whose voice is a wonder.

                                                                         

Okay. Apart from Ms Malefane there are other companies that possess similar qualities, indeed they are the qualities that all good companies aspire to. So?  I've thought about this and I think it's the energy.  They can go from 0-60 in an instant.  I haven't seen that.  Stillness, then, bang, high energy and never for a moment does it get ragged or lose focus or freshness. As simple and as hard as that.  They are truly something to be seen.
And, a special plea, whoever has removed from Youtube the clip of Pauline Malefane singing Summertime with Simon Rattle and the Berlin Philharmonic please put it back. In my opinion not to make it publicly available is pretty close to a criminal act.