Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Apple Takes Down In-App Purchasing Hack Video –
Yesterday we saw a scary & disturbing video released on to Youtube which showed a very easy way to by-pass payment for in-app purchases and would allow you to get multiple in-app purchases from the majority of apps for free. The hack works on devices running iOS 3.0 – 6.0. The hack did not require any form of Jailbreak and could be done very simply. This caused a big threat to developers who make their applications free relying on users purchasing in app purchases.
Apple responded to The Loop saying :
“The security of the App Store is incredibly important to us and the developer community,” Apple representative Natalie Harrison, told The Loop. “We take reports of fraudulent activity very seriously and we are investigating.”
Today we have just been tiped that the video demonstration which started the roller coaster yesterday has been taken down of Youtube not by the users choice but by a copyright claim by Apple Inc. I would not bank on the video coming back online any time soon