James Randi may have done bad things in his life but he has also done good things, like to show the lies, exaggerations, deformations, tricks, illusions, of some scammers.
But in this presentation, this man is going too far. You cannot sum up years of research of Hulda Clark and ridicule her like this in a few minutes. Science is about observing the world, and trying to understand how it works, to improve our understanding and to create new techniques, new technologies, not about claiming that we know everything about everything and never investigate, never experiment.