I work in a corporation with locked down desktops that we don't allow people to install software from the internet. I just spent months getting Silverlight packaged so people would have access to this training. Now you have decided to make the web site inaccessible again by requiring a new version of Silverlight which will take me more months to package. After which, I'm quite sure you'll break it again.
 
There is no earthly reason to require a new version of Silverlight just to view a video. Please return this page to using the older version. We cannot have these kind of breaking changes in an environemnt where everyone is so security conscious that they aren't allowed to uypdate this software.