Why would anyone do that? It simply makes no sense for video and unlike print stuff, only absolute pixels matter. You have to inquire about that.
You need to ask them, "How many dots per centimeter?" If they can't answer that, ask, "How many dots per inch?" and you'll have to do the conversion. If you don't know that, you can't calculate how many horizontal and vertical pixels you need for your comps.
Judging by that delivery requirement, these people aren't very experienced in using video animations,. Expect further trouble.
Thank you for the answer. I just couldn't make any sense of it.
Thank you! I've tried asking them about the pixels, but they only replied that they cannot answer it.....