To display one bullet at a time on a slide
Create
a slide and add the first bullet.
Select
the slide.
Copy
the slide.
Paste
the slide below the original.
This will create a new slide that looks like the original slide.
Add the next bullet point.
Repeat steps 2 - 5 until the final slide contains all of your bullet points.
Time
the slides with the media so that the slides transition at the appropriate time.
Note
You can also use this technique to modify the font size of a bullet or the icon of a bullet to denote that it is the current topic.