Click
Insert > Movies and Sounds > Movie from
file in your PowerPoint menu. Now click Browse
in order to select your default movie. If you
don't have a default movie that you can use, just
insert small movie with 1 frame only with the
correct dimensions with the same color as your
background.
Also note that it is best to always use movies
of the same dimension as all movies are stretched
to fit the first and initial movie place holder.
This is only valid when the movie is not played
in full screen.
At the Insert button you will get more options
to choose from after clicking the small arrow
in that button. Choose Link to file.

Click DataPoint > Linked object
properties to continue.
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