An e-mail from Dan Mitchell, Senior Fellow at Cato Institute and a co-founder of the Center for Freedom and Prosperity, tells me that there are now numerous videos on YouTube that deal with such subjects as the Laffer Curve and tax reform.
There are three recently completed and posted videos on tax havens and why they are quite a good idea though, presumably, one would not need them if other countries had more sensible tax regimes.
They are called respectively The Economic Case for Tax Havens, The Moral Case for Tax Havens and Tax Havens: Myths v. Facts.
I haven't quite worked out how to embed videos in blog postings as the one piece of advice I was given did not seem to work out in practice. So, in the meantime, there are links to YouTube. Enjoy.