But they actually have three different URLs:
Of these, only the second one - http://www.amara.org/en/videos/q1oiqbn2Kp2R/info/albert-laszlo-barabasi-at-tedmed-2012/ - works correctly.
In the first and third one, the player is replaced by "a is null" and there is no URL in the URL tab.
I've asked cerebraltangent if he had noticed anything strange happening when he created the page from the YT URL. He hasn't.
So could Amara staff look into what might have caused this, explain it here on the forum, check for possible other instances of this glitch, then delete all zombie pages like the 1st and 3rd mentioned here, please?