A video of most of the first part of Don Patton's first lecture at Bullard High School can be found here. Don spends the bulk of the video cherry-picking divergent predictions from radiometric dating, most of them unsourced in the presentation. Some of the observations are not even pertinent to the reliability of the method, or even misrepresentative. At one point he complains that potassium-argon dating of Mt. St. Helens ash eleven years after the 1980 eruption yielded a range of values from about 0.5 to 3 million years, ignoring the fact that potassium-40's half-life is 1.3 billion years, which is to say about eight orders of magnitude greater than the time scale he wishes to measure. This is like taking the blunt end of a meter stick and using it to estimate the diameter of an atom.