Try downloading and opening the following PDF sample in Adobe Acrobat Reader.

1.0 Acrobat Reader

If you  don't have Acrobat Reader installed then download and install from here:

https://get.adobe.com/uk/reader/

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2.0 Flash Player 

If the embedded doesn't play when clicked, you probably need to download and install Flash Player from here:

https://helpx.adobe.com/acrobat/using/flash-player-needed-acrobat-reader.html