Usually only available to registered devs through Apple’s website as part of its $99/year developer program, videos of Apple’s developer sessions from WWDC 2013 have now made it ‘unofficially’ to YouTube. The sessions were first noticed by Safari and WebKit developer Timothy Hatcher (via MacStories), but it’s unlikely Apple is behind the account because of the NDA nature of the content.
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Update: As expected, Apple confirmed to iMore’s Rene Ritchie that it did not upload the WWDC videos to YouTube and that the unofficial WWDCVideos channel is in violation of NDA:
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