The video comes courtesy of Charlie Gibson and ABC News:

So basically it sounds to me like he lost because he did too well in the 11 prior contests? Furthermore, he does admit to the campaign making mistakes but I’m wondering what he thinks the mistakes were? It also seemed like he acknowledged the pro-Obama media bias that was glaring just before the March 4th primaries and recognized that perhaps he faced a slight backlash from it.

The fact of the matter though is that his delegate lead should hold him through even if Clinton picks up some more victories in her given states, which may be Pennsylvania.