Following catbox being excluded from the wayback machine, many parts of googlevideo.com (a backend YouTube domain used for videos) have been excluded.
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Britney Spears Hidden Message
This screamer video was uploaded back in 2006 by the user VenerableDread, the same uploader of the Saddam Hussein Execution prank. It plays an extract from Spears' song "Baby One More Time", then plays it in reverse *rewriting next part to remove subjectivity.
Link
NOTE: The following video contains a screamer.
- youtube.com/watch?v=jNN_uolut_I