As Ruben pointed out, you'll need to create a custom media tag for video from ESPN, if you look through the javascript kludge you can see the video id which is the same as the "clip" id in the URL, these are what you'd adjust by using one of the default media tags as a guide.
I believe ESPN is one of those sites that block people from embedding their feeds outside of their website; you're more than welcome to test (heck, even placing that code on a simple .html page in your webspace to see if it'll load) before investing any time in trying to embed it.
Last edited by Gizmo; 01/26/2016 8:32 PM.