This comparison may be of interest.
In reference to Chris DiBona's comments on WhatWG about Theora and YouTube, it says the following:
"While different files may produce different results, the allegation made on WhatWG was so expansive that I believe a simple comparison can reliably demonstrate its falsehood.
"I do not believe Chris intended to deceive anyone, only that he is a victim of the same outdated and/or simply inaccurate information that has fooled many others.
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