The second Day of the Doctor prequel minisode The Last Day was released to some confusion which meant UK licence payers couldn’t see it without paying. Things have calmed down but in case you haven’t seen it yet, try the StarBurst article TV News: Second DAY OF THE DOCTOR Webisode Released which also contains a link to YouTube.
What about the Last Day?
Unlike the remarkable Night of the Doctor this is an odd beast showing the fall of Arcadia. It is (as many have said) very much like the Xbox 360 game Halo in look and feel and seems to add nothing tangible to what we assume will be in the Day of the Doctor. Maybe it is left over footage or maybe all will be clear in 24 hours from the time I write this!