More important, I think: quite apart from its advantages as a campaign tool, the video is itself evidence of Thompson's actual presidential qualifications. You can't make a quickie spot like this unless a) you know what you think (or have a really fast pollster) b) you can react to new situations quickly, and c) you have some sense of theater. Those are all extremely important things for a president to have.
Yes, the Bush Administration has lost a lot of ground due to the lack of (b) and (c). And sometimes (a).