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/
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