It would have, had it been afloat. A displacement hull pushes aside an amount of water equal to itself in weight. Once that point is reached the hull is afloat, or neutrally buoyant. In that condition it can roll freely within the limits of its righting moment, which is the force tending to roll the hull upright. For a stable hull design that is afloat the righting moment increases as the degree of roll increases, due to leverage, and reaches a point where it overcomes the momentum of the roll and the hull rolls back the other way.
The problem in this case definitely appears to be that the hull was tipped over before it was being supported by displaced water. In other words, it didn't capsize, it fell off the dolly.
I'm thinking the only way they could have saved it was to ram that hull into the water STAT so it could have a chance to float and right itself, the hesitation did them in, if they had tried to pull it back out at that point it would have tipped anyway. Strange is that we don't get to see the dolly as it enters the water, it's been edited out, I'm sure their insurance co. will want to see it though!.