YouTube had the content removed in 22 minutes, according to the report, and as of this writing, the show's channel has been replaced by a message saying it is unavailable.
YouTube representatives declined to comment on Sesame Street's incident but said the removal of the content was in keeping with user guidelines.
"YouTube's Community Guidelines prohibit graphic content," a YouTube spokesperson said. "As always, we remove inappropriate material as soon as we are made aware of it."
Hackers also altered the Sesame Street YouTube channel's profile page to add the name MrEdxwx as the user, according to a screenshot posted by Naked Security. The profile also included the following message:
WHO DOESN'T LOVE PORN KIDS? RIGHT! EVERYONE LOVES IT! IM MREDXWX AND MY PARTNER MRSUICIDER91 ARE HERE TO BRING YOU MANY NICE CONTENT! PLEASE DON'T LET SESAME STREET TO GET THIS ACCOUNT BACK KIDS
PLEASE...LET ME AND MRSUICIDER91 HAVE IT AND WE GONNA MAKE ALL THE AMERICA HAPPY!

Google plugged a vulnerability in July 2010 that allowed hackers who had it in for pop star Justin Bieber to attach off-color pop-ups and adult-site redirects to YouTube videos. A cross-site scripting vulnerability was blamed for enabling the hackers to insert code onto the popular video site's viewer-comments pages.
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