Consider video tutorials to go with our written tutorials

This issue is following up on a wonderful suggestion from @simonprovost [here](https://github.com/geojupyter/jupytergis/pull/608#issuecomment-2787698326).

Similar to how [JupyterLab's Extension Tutorial](https://jupyterlab.readthedocs.io/en/stable/extension/extension_tutorial.html) has an amazing video tutorial by @jtpio (https://www.youtube.com/watch?v=mqotG1MkHa4).