The video begins in German, but after only 41 seconds shifts permanently to English (and later American), so don’t be dismayed. Stick with it.
The German professor, in his words of welcome, describes Professor Salby, from Macquarie University in Sydney:
He is known all over the world as one of the few specialists who really have a view over the whole area of climate development. Despite his long relationship with the most renowned climate institutes, he has preserved his own critical and constructive reasoning, which in some parts is in real contradiction to the official expert opinion and also [opposes] the assessment of the IPCC.