How do I click to proceed during training videos?

--- Quote Start ---

Hmm...which training are you having a problem with? The demos should not be behaving like that.

--- Quote End ---

For example, in this video: https://www.altera.com/customertraining/webex/partialreconfig/presentation.html

If I click the section 'Demonstration'

A new Safari window opens with the demonstration. This new window is the one with the issue.