Yes, looks like it is available in the UK only, although I'm sure geeks know how to get around that.
I just tried to screen capture some moments from the programme, but it doesn't seem to like Firefox on Ubuntu.
I guess it is just a matter of waiting until the BBC makes its output available globally.
In the meantime just imagine getting some bubble gum and blowing a big bubble and then putting it on a plate. That is how it looked - except he used mozarella, not gum, and smoke instead of air.