Update README.md

Author: r0f1

README.md

@@ -13,7 +13,7 @@
 [missingno](https://github.com/ResidentMario/missingno) - Missing data visualization.  
 
 #### Pandas and Jupyter
-General tricks: [link](https://www.dataquest.io/blog/jupyter-notebook-tips-tricks-shortcuts/)  
+[General tricks](https://www.dataquest.io/blog/jupyter-notebook-tips-tricks-shortcuts/), [Clean Coding (video)](https://www.youtube.com/watch?v=yXGCKqo5cEY)  
 Fixing environment: [link](https://jakevdp.github.io/blog/2017/12/05/installing-python-packages-from-jupyter/)  
 Python debugger (pdb) - [blog post](https://www.blog.pythonlibrary.org/2018/10/17/jupyter-notebook-debugging/), [video](https://www.youtube.com/watch?v=Z0ssNAbe81M&t=1h44m15s), [cheatsheet](https://nblock.org/2011/11/15/pdb-cheatsheet/)  
 [cookiecutter-data-science](https://github.com/drivendata/cookiecutter-data-science) - Project template for data science projects.