Here is a great idea. The proceedings of an historical conference posted online. They are videos rather than podcasts and they look at various aspects of protesting over the years. Its an interesting angle and it covers a lot of ground. I always like to hear about Captain Swing for instance. It is good to remember that the countryside wasn't the idyllic place it is often portrayed as.
The drawback is that the audio quality isn't good on any of them, and is terrible on a couple. Also we could do with a bit of context about who the speakers are.
But it is a good initiative and I'd love to see more of this kind of thing.