In Tour De Flex, try YouTube API then embedded player then paste this video PuFeb5RH1W8 into the search field. Compare the poor sound quality with the version on www.youtube.com
This is happening to both the chromeless and even the chromed versions that are being invoked via SWFLoader. The same video sounds just fine on various YT test sites, where the same embed players are embedded within html pages. It even sounds just fine within the SareFire AIR application, via webkit.
So, what is garbling up the sound on some of the videos but not all of them ?