There is nothing special about Mr Albright that would get anyone excited to listen to her ramble on. Most democrats and potential Hillery voters don’t even know who she is. But standing next to her is the comparatively “youthful”, and vigorous Hillery.
The same with Bernie Sanders. Sanders was specifically chosen by the DNC to run against Hillery because he would have no chance of winning and next to him, she would look, like the non-crazy, young alternative.
This is all just a big production for them. They don’t mind spending millions to produce it because, it’s not their money.