Video not playing from website

Hello All,

I'm not a tech savvy person so I need some help. I have an ACER laptop/tablet. I have to access a video for school from CITIprograms.org. When I click on the link for the video a separate tab opens on my explorer browser and

The Mediasite presentation cannot be played back.
The requested presentation content can be played using the following plugins:
WindowsMedia, Silverlight
We have detected that your browser supports the following plugins:
Html5, MPEG-DASH in MSE, HLS in MSE, Native HLS

is displayed. I have Windows Media Player on the computer and tried to download Silverlight too. I don't know what I have to do to get the video to play. Any help would be appreciated.

Thank you