Can not view tutorials/Missing plugin

Hi,

Great site. Thank you.

When I try to view the tutorials, a blank white video window loads with the message, 'Missing Plug-in'. 

This only happens on my laptop, and only started after I cleaned the start menu on my computer. I have no problems viewing videos on other sites (news sites, Lynda, etc).

Can someone tell me which plug-in is missing?

Thank you.

Jeff

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