Wistia videos

Hey,

I started to develop my first addon, and I am running into a problem. The addon is supposed to show videos of a paid side. They use wistia as a video host. Since I’m a total noob I hope to find help here. I managed to download a video by looking at the source code and then using a video downloading website as described in https://www.youtube.com/watch?v=brPg8So8H-E.
I was also successful inspecting the side with Firefox by looking at the Media/Flash GET-methods. There I got an URL which I can play in kodi (using the example-video-plugin)

Any ideas on how I can proceed?

-Thanks