I embedded a vimeo clip onto a website. Works fine.

I then added a second clip to my vimeo account and now the embed on the website shows both videos. I only want one clip on that embed.

What did I do wrong now?
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Strange. Try re-copying the videos' embed link info. Then pasting it back onto your site. Maybe there is something with profiles which only have 1 video, as opposed to multiple, that when you add more, it then numbers the videos (1, 2, 3 etc) in the link.