Rumors began to rumble online on Monday morning following the apparent release of more than 100 developer-only videos on YouTube from Apple's WWDC 2013 developer conference in June.

Some were extremely pleased to have access to such a vast array of content. Some thought it was a little suspicious, considering the technology giant charges up to $99 per year per program for developers, and $1,600 for tickets to the exclusive conference, which sold out in just a few minutes .

Alas, it was the latter over the former.

The rumors began after some tweeted links to the videos. But a few things appeared to give the game away. Across the selection, there were only a few hundred views on each video — some with far less. Also, the banner and the logo behind the YouTube channel looked clunky and out-of-sync with Apple's desired design aesthetic.

And above all else, Apple hadn't said a thing. Not a shred of publicity, and no public statement.

Until today.

A spokesperson for the company, notorious for its secrecy, confirmed in an email to ZDNet that the videos, "have not been uploaded by or are authorised by Apple."

The sessions that were covered included iTunes Connect, application sandboxing, iAd development, OS X Mavericks and iOS 7 development, and accessibility features. An estimated 300GB worth of content were uploaded to the videos-sharing site, and included high-definition 1080p quality.

Apple has more than 300,000 iOS developers in the U.S., with tens of thousands more around the world. Apple developers are also under non-disclosure agreements (NDAs) which prevents them from disclosing content publicly. It will be almost impossible to determine who uploaded the videos, unless Google gives up the user to Apple — which it has no incentive to do.

We got in touch with Google, which owns YouTube, to see if it had received any requests from Apple to take down the videos, but did not hear back at the time of writing. We'll update you with more as soon as we get it.