In this tutorial you will learn how to add Youtube video to your Keynote presentation:
Step 1. First, download Free YouTube downloader HD for Mac from Enolsoft or convert your youtube link on zamzar.com
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Step 2. Insert your downloaded clip in Keynote via drag and drop.
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The movie becomes an object in Keynote. You can use inspector window to add border, shadow and eflection.
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Result: you have inserted your Youtube clip in Keynote.