https://www.youtube.com/watch?v=_JJn4vx7Zxs&t=3s Per the video description: "A portion of this video (0:02-0:03) is published under the Creative Commons Attribution-Share Alike 4.0 International license. We retain the exclusive rights to the rest of the video."
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.