Permission to use video clip

So in our documentary, we need a clip from youtube that will help us achieve the professional look we are aspiring to get. As we have seen in many scientific documentaries, they have some form of animation and thats what this clip is. Below is a print screen of me asking for permission to use the video.

The terms and condition we do not want to break:

7.7 You agree that Content you submit to the Service will not contain any third party copyright material, or material that is subject to other third party proprietary rights (including rights of privacy or rights of publicity), unless you have a formal licence or permission from the rightful owner, or are otherwise legally entitled, to post the material in question and to grant YouTube the licence referred to in paragraph 8.1 below.