I have a client that wants to place videos in the four quadrants of a
circle, start one, and have it fill up the screen as it runs, dim it
when it's done, and have images then appear over the dimmed video.
Just not sure this can be done in PPT. I am not sure how to create the
circle and have the video show up and run in just one quadrant.
either. Perhaps there is some kind of plug-in that would work for
this?

They also want a Google Earth shot to start from space, and zoom into
a country and then to a tight aerial shot of some fields. I think I
might be able to do this with the Google Earth Pro edition, but will
the file that generates work in PowerPoint? Apparently this client is
a fan of An Inconvenient Truth (which I think was done in Keynote) but
wants to use PPT, not Keynote.

Any suggestions on how to achieve these things, and any suggestions on
what software I might want to consider to create this type of higher-
end PPT would be great -thanks!