A quick search doesn't turn up any recordings of his lectures on ancient history. I'm not sure that they exist. VDH has been doing very little public work over the last 20 years that isn't about modern issues - whether overtly or by implication - because that is how he sees the role of the Classicist in society. In the past, he taught courses on Greek language and history at CSU Fresno, but in recent decades he has shifted his focus, and he is now effectively a professional pundit who uses his knowledge of history as a resource to make arguments about modern politics and the modern academy.

All of the above is simple fact and I am not trying to break our rules with a political agenda of my own. VDH can say what he likes. However, I would be a bad scholar of Greek history if I failed to mention that his views on history have been largely disavowed by others in the discipline who recognise the importance of modern politics in his interpretation of the past. His work on all periods and subjects is irredeemably coloured by his political views and should be handled with extreme caution. I recently did an AskHistorians podcast explaining this in more detail. In that post you can find links to several threads in which I address particular aspects of VDH's view of Greek history.

Instead of feeding your brain on outdated views distorted by an ideological filter, I would recommend seeking out the work of other professional historians. Excellent free online courses on the Classical world are available from places like the Open University.