Preparing a presentation for interview regarding a PhD position
I would focus on the research &quot;questions&quot; that you will attempt to answer. What hypotheses you have about the subject in question. Something about how you will begin to attack the questions (methodology), even if not too detailed. If time permits, something about where you think the research would lead you in the future.
If you already have approval for the research, then I suspect that all of this is readily available to you.