There is a way to put a video into an event in Eventkeeper.  There are two ways to do so depending on how you want it to show up.

As a link:

You can link to the video in the description field. 

• You should see a small chain button.  When you click it, it will ask you to put in a URL for the video. 
• Use the url you get from the SHARE button in Youtube.
• Save the event.  The video will be a link that will open up in Youtube.

As an embedded video:

You can also embed the video into the description field. 

• First your need to click on SHARE in youtube and select EMBED from the sharing options.  This will give you a sting of code that starts with <iframe>.
• Copy all of the code
• Then go to the event description in EventKeeper and click on the SOURCE button.  This switches the description field editor to straight code. 
• Paste all of the <iframe> code into the description field and then click SOURCE again. 
• Save the event.