Downloading the file is a quick solution to get you going without further troubleshooting.

Right-click (Windows) or Control-click (Mac OS) the link to the PDF file.
Choose the appropriate save or download option. The options vary depending on your browser:
    (Internet Explorer) Save Target As
    (Firefox) Save Link As
    (Safari) Download Linked File

Right click on Video to Re-play
Adobe Reader and Adobe Flash Player needed

download Adobe Reader

Can't view video in Chrome:
In the Chrome address bar, type chrome://plugins.
Under Chrome PDF Viewer, click Disable
Enable the Adobe Acrobat or Adobe Reader plug-in.
Close the Plug-ins tab and restart Chrome