In case you were wondering, that video was posted by a legit Apple blog, and it is just one of a bunch of examples which can be found on Youtube. I'm still not sure how this bug happened, but I can tell you that it first cropped up at least 3 months ago. The earliest videos on Youtube were posted in October, and this may have been happening for a few weeks before the videos were posted.
If you'd like to try this bug out, you can find Google Now as part of the Google Search app for Android. That feature will only install on devices running Android 4.1 or above, and the fact that this version of Android is only running on 10% of Android devices might explain why the bug has was under the radar for so long.