This is the blog post that video comes from: <a href="http:&#x2F;&#x2F;blog.mdsec.co.uk&#x2F;2015&#x2F;03&#x2F;bruteforcing-ios-screenlock.html" rel="nofollow">http:&#x2F;&#x2F;blog.mdsec.co.uk&#x2F;2015&#x2F;03&#x2F;bruteforcing-ios-screenlock....</a> It has a bit more context.