I don't know how to post NHL.com videos. How do you do it?
When you're watching a goal highlight on the pop-up player, move your cursor into the video and a box will appear toward the top left with icons for Facebook, Twitter, Google+, and one that just says share. Click the one that says share and it should give you a URL. Just like on Youtube where you copy everything after "v=", copy everything after "id=", post it on here, and wrap it in NHL and /NHL tags.