A podium is a raised platform on which you stand to deliver a presentation or a speech. Think of "pod" like "podiatrist" which is a foot doctor, and remember that you put your feet on a podium. These folks are all standing on a podium.
The thing you stand behind and set your notes on is NOT a podium. It is a lectern. Think "lecture" and imagine a professor giving a lecture from his notes, which he has before him on the lectern.