There are some doubts about the license of this image. Please consider following:
It is an animation used to illustrate the creation of this mosaic.
The original Wikimedia logo is copyrighted to Wikimedia Foundation.
Warning: the Wikimedia logo is a registered trade mark of Wikimedia Foundation, Inc. in several jurisdictions including the United States of America. As such, its use without the authorization of Wikimedia Foundation, Inc. is restricted.
This picture is made of 1200 freely licensed images, but take note that all of those images are only very small parts of the mosaic.
The mosaic itself is a collection of images (just like any other gallery here) and so is licensed under the terms of GFDL.
Considering all that the author of this screenshot believes that the image should be released under the terms of GFDL with a trademark notice (restriction).
™ Wikimedia Foundation, Inc.
このファイルは、ウィキメディア財団もしくは同財団が運営するプロジェクトの公式なロゴまたは意匠を含んでいます。ウィキメディアのロゴおよび商標は、ウィキメディアの商標利用方針(日本語訳)およびビジュアル・アイデンティティ・ガイドライン(日本語訳)のもとで利用可能であり、別途許可が必要な場合もあります。
{{Information |Description=An animated version of this image, illustrating its development from early November to its final version on 1 December, 2006. |Source=Wikimedia logo mosaic |Date=2006-10, 2006-11 (publis