The apology by itself appears genuine, but also appears more apologetic for reflecting the truth behind almost all liberals.   They are, by ideological disposition, genuinely trapped in a life fraught with expressed hypocrisy.
Liberal advocacy is always, 100% of the time, structured around a ‘do as I say, not as I do’ advancement.   I have never met, nor witnessed, a modern liberal who actually walk their talk.

Subsequently, to me at least, this apology is more associated with an outcome of being called to the mat. Watch the entire video and toward the end you’ll see this is not an apology toward Mitt Romney, it’s an apology toward a mirror.