Pam Dewey has had a website up for many years chronicling the various religious groups in America as well as the Church of God movement. She has also been tackling many of the myths in American lore and history. Her Myth America site seeks to "Dispell MythInformation and MythPerceptions about American history.
Here is her latest video production:
You can continue to part 2 & 3 on her YouTube channel: Meet Myth America