Building the Berkeley Fire 1923 Leaflet map

ARF Practical Workshop. In this video I describe assembling data to create a web mobile using the Leaflet JS library.
Direct link to webmap
https://arf-berkeley.github.io/1923-Fire/map/
For more links and background please see the accompanying website at the ARF, UC website "Berkeley 1923 Fire Map"
https://arf.berkeley.edu/projects/berkeley-fire-1923-dynamic-map

The goal of this video is to describe the GIS project that was assembled to generate the map so that similar maps could be developed for regions and about other themes. This is not a beginner GIS tutorial; I assume you know how to do a spatial join, for example.
Plugins used
QGIS2Web
QuickMapServices plug-in
OSM downloader

Sanborn Maps on the Library of Congress website
https://www.loc.gov/item/sanborn00419_002/

Hillside School
https://en.wikipedia.org/wiki/Hillside_Elementary_School

Alameda County parcel viewer (AGOL)
https://www.acassessor.org/parcel_viewer/