The Minnesota GOP noticed that, hey, some Obama appointees were having tax problems. And then they remembered that last year, Al Franken had some tax problem, in California! So they made a YouTube.
And, amusingly, the YouTube features Al's fairly succint explanation of the tax problem: his accountant fucked up. But that doesn't even matter because who will this video convince and what will it convince them to do? Franken already probably won his election by a couple votes and now it's tied up in court. Is this directed at a judge? A judge would probably not see this video and decide, based on that catchy tagline, to give some extra votes to Coleman as a reward for paying his taxes.
So, yeah, some video intern at the Minnesota Republican Party just had some free time, we guess. Al Franken sucks! Paying your taxes rules!