I have come to this conclusion because this same URL was being blocked in Disconnect.me's malvertising filter (I contacted them also), and temporarily allowing it to work allowed videos to play. I just tried to disable the malvertising filter, and now I'm seeing the same URL being blocked in EasyList.
And now, an excerpt from a song I like:
Oh, fuckshit, bitch, damn cocksucker
Pussy, asshole, cunt
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