This is the part of youtubes 'Terms Of Service' that everyone agrees to when they create an account with them.
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6. Your User Submissions and Conduct
A. As a YouTube account holder you may submit video content ("User Videos") and textual content ("User Comments"). User Videos and User Comments are collectively referred to as "User Submissions." You understand that whether or not such User Submissions are published, YouTube does not guarantee any confidentiality with respect to any User Submissions.
B. You shall be solely responsible for your own User Submissions and the consequences of posting or publishing them. In connection with User Submissions, you affirm, represent, and/or warrant that: you own or have the necessary licenses, rights, consents, and permissions to use and authorize YouTube to use all patent, trademark, trade secret, copyright or other proprietary rights in and to any and all User Submissions to enable inclusion and use of the User Submissions in the manner contemplated by the Website and these Terms of Service.
C. For clarity, you retain all of your ownership rights in your User Submissions. However, by submitting User Submissions to YouTube, you hereby grant YouTube a worldwide, non-exclusive, royalty-free, sublicenseable and transferable license to use, reproduce, distribute, prepare derivative works of, display, and perform the User Submissions in connection with the YouTube Website and YouTube's (and its successors' and affiliates') business, including without limitation for promoting and redistributing part or all of the YouTube Website (and derivative works thereof) in any media formats and through any media channels. You also hereby grant each user of the YouTube Website a non-exclusive license to access your User Submissions through the Website, and to use, reproduce, distribute, display and perform such User Submissions as permitted through the functionality of the Website and under these Terms of Service. The above licenses granted by you in User Videos terminate within a commercially reasonable time after you remove or delete your User Videos from the YouTube Service. You understand and agree, however, that YouTube may retain, but not display, distribute, or perform, server copies of User Submissions that have been removed or deleted. The above licenses granted by you in User Comments are perpetual and irrevocable.
D. In connection with User Submissions, you further agree that you will not submit material that is copyrighted, protected by trade secret or otherwise subject to third party proprietary rights, including privacy and publicity rights, unless you are the owner of such rights or have permission from their rightful owner to post the material and to grant YouTube all of the license rights granted herein.
E. You further agree that you will not, in connection with User Submissions, submit material that is contrary to the YouTube Community Guidelines, found at
http://au.youtube.com/t/community_guidelines, which may be updated from time to time, or contrary to applicable local, national, and international laws and regulations.
F. YouTube does not endorse any User Submission or any opinion, recommendation, or advice expressed therein, and YouTube expressly disclaims any and all liability in connection with User Submissions. YouTube does not permit copyright infringing activities and infringement of intellectual property rights on its Website, and YouTube will remove all Content and User Submissions if properly notified that such Content or User Submission infringes on another's intellectual property rights. YouTube reserves the right to remove Content and User Submissions without prior notice.
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Note B, and D, you are uploading content against both of these clauses, so you are not only breaking the law you are breaking a legal contract with youtube.
And if you read C it states that you grant anyone the right to download, and use however they wish, any content you have uploaded.
So, even though you are still the 'owner' of your video's, you no longer have any control over it, legal or otherwise.
Anyone who has not yet got the message is beyond all hope.
Cheers David (who is well and truly done with this)