Getting started with SharePoint Framework domain isolated web parts
In this video Paolo Pialorsi (PiaSys.com) is demonstrating how to create domain isolated web part with SharePoint Framework and how to configure the different isolated permissions this web part can then have.
Presenter – Paolo Pialorsi (PiaSys.com) @paolopia
See more details on domain isolated web parts from the official SharePoint dev documentation – https://docs.microsoft.com/en-us/sharepoint/dev/spfx/web-parts/isolated-web-parts
More details on the SharePoint developer community from http://aka.ms/sppnp.