Here's a brief discussion of exposure strategy and its relationship to development. There's a handshake introduction to the Zone System. This is very basic stuff.

Contains basic-intermediate material, 15 minutes.
Len Cook discusses the basis for light meter operation and some of the relative strengths of reflected and incident light measurements.

A veteran photojournalist and college photo instructor shares lectures recorded in class, then edited for podcasts. Basic material.
Here's a 6-minute chat on a simple way to set your camera in daylight, and the meaning of the shutter speed numbers.