I think it's something on YouTube's end, the seem to be giving random different links to the same video.
Clicking: Share, then click: Copy Link

https://youtube.com/watch?v=QuWDDx2-CgA [Embed]

https://youtube.com/watch?v=QuWDDx2-CgA [Embed]

https://youtube.com/watch?v=QuWDDx2-CgA [Embed]