In this video, we will talk about:
How to use the Processing Toolbox of QGIS in PyQGIS.
you can find the link to the QGIS tutorial:
https://www.youtube.com/playlist?list=PLCxnvDblgXGQHKgnbRTFB6a6AeKqYy9-9
and the link to the Python tutorial:
https://www.youtube.com/playlist?list=PLCxnvDblgXGTfJcwQx99Rmswdth7CmF_8