I hope there will not be similar easily-avoidable (with a bit of care!) gaffes in coming days, although the linked report says that LOCOG have not yet established who made the offending video-clip. Don't they have such 'minor details' on file of who their sub-contractors are, if only so they can settle production invoices? The cynic in me now wonders if there will be found on the production staff someone from one or other of the 'two Koreas' who was trying to make some kind of point. Whatever the case, it was rather unfortunate - it's not as if the two flags are in any way similar (the way for example that the flags of Italy/Ireland or Netherlands/Luxembourg might at first glance be mixed up). One could hardly have imagined a gaffe likely to cause more upset than this one, specially as the two countries are technically still at war with each other.
In any case, here is the anthem and flag of the DPRK; the tune is quite rousing, whatever else one might say about it and that country: