Here the link for a rather good screen capture programme. You have 30 days to get your project done.
Download Camtasia Free Trial for Mac and Windows
Keep in mind that not all xx days of free use is the same.
Some are 30 days from installation, others are 30 days of use, which means, days not used are not counted. So ... , practice with Camtasia first, then download and run the trial Google Earth Prgramme.
Some tips:
When you create a presentation with whatever media, make the screens 800x600.
That is, today, usually the minimum *any* computer screen can *see*.
Any less, and the pictorial presentation gets tiny, too small to see detail.
The length of each *page display* should be
at least a few seconds, then the length of *your presentation*, and then another few seconds.
When you use trial programmes, you usually have to submit a *valid* e-mail account.
I suggest you create an e-mail account with *yahoo* for instance, and call that account your *junk* account. Then from then on, use that account as your *junk* account, because you WILL get junk mail afterwards. The last place you want that mail to be is in your *regular* mail account.
The trial version of Google Earth, mentions a trial demarcation on the screen. There is a way to get around that on your final presentation.
Note where the trial demarcation is located, and then make sure on your window screen capture, that the demarcation is outside of your screen capture.
This is what I assume that demarcation will look like.
So when it is on the bottom, try to locate a reference point south of Singapore, an the screen capture will then not contain the demarcation ...