The first church was actually Woodward Avenue Presbyterian Church, which was not included in the comments unless I missed it. It was at Woodward and W Philadelphia St.
Great documentary, however you need to seriously balance your audio. What's more important? The narration of your story and all your research and writing you have put into this, or the BLING BLING of plunking on a piano? Your video skills are also incredible.
Years ago, I explored the church featured at 10:41. It was rather amusing, in a dark humor way, to see that engraving that read, "And you shall say, god did it" right in the middle of the ruins.