How to implement Video Heartbeat

I am trying to figure out how to implement video Heartbeat. We currently use Wistia for our videos. I am also using DTM. Can someone tell me how to implement the use of Video Heartbeat. I tried reading the documentation, but I'm still not clear on what I need to do. I did download the Java SDK file for Heartbeat. Should I then add that complete sdk directly onto my site or through DTM? Also do I need to add some API for Wistia? Finally how do I then assign variables to track video data. This is all new implementation so I do not have any assigned variables for any previous video tracking.  

Thanks for your help.