Once again, when I copy/paste it into the post, and then click preview, everything is as it’s supposed to be. However, when I click SAVE it turns back into a hyperlink and when I click PREVIEW it displays the hyperlink–not the video. When I return to the draft, I can un-link and it’s fine–and then I click save and it turns back into a hyperlink.
BTW, I tried it with your example: Same thing. Of course, there was no actual video.