Update README.md

Learning the Dom in short order, for beginners.

Author: Dkeys4

README.md

@@ -490,6 +490,7 @@ All the translations for this repo will be listed below:
 -  [Render Tree Construction — Ilya Grigorik](https://developers.google.com/web/fundamentals/performance/critical-rendering-path/render-tree-construction)
 -  [What exactly is the DOM?](https://bitsofco.de/what-exactly-is-the-dom/)
 -  [JavaScript DOM](https://www.javascripttutorial.net/javascript-dom/)
+-  [Traversing the Dom with Javascript](https://www.youtube.com/watch?v=Pr4LLrmDLLo) - Steve Griffith (YouTube)
 
 ### <img  align= center width=50px height=50px src="https://camo.githubusercontent.com/bbbcc076f47d621aeab7bc4a6d8b3cfa2e13b78bda9dd0dcd97c64ebe5b0b64c/68747470733a2f2f696d672e67656e69616c2e6c792f3566393136303830363461643939306336656531323233372f62643731393561332d613862622d343934622d386136642d6166343864643464656234622e6769663f67656e69616c2631363433353837323030303633"> Videos