I often have to go to the post proper in order to get the right video embed, because for reasons that don't make sense (or anyway not enough sense for Dreamwidth to figure out how to fix), video embeds on my reading page often display as a video embedded on my reading page several posts or sometimes days ago.

this did not help me in this case—not that I really expected it to, because it was showing on my reading list as "Video unavailable - Watch on YouTube"—and then the Watch on YouTube link that comes with the embed directed me to a URL that ends in ?v=videoseries when the link itself plainly has the list's alphabet soup identifier. but the link lola posted works beautifully!