diff --git a/docs/cheatsheets.md b/docs/cheatsheets.md
index 62016f74..a44e8708 100644
--- a/docs/cheatsheets.md
+++ b/docs/cheatsheets.md
@@ -370,6 +370,8 @@
 - [guides.github.com: Markdown Cheat Sheet 2](https://guides.github.com/pdfs/markdown-cheatsheet-online.pdf)
 - [Markdown Cheat Sheet 3](https://3os.org/markdownCheatSheet/welcome/)
 - [Markdown Cheat Sheet 4](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet)
+- [freecodecamp.org: Markdown Cheat Sheet – How to Write in Markdown with Examples](https://www.freecodecamp.org/news/markdown-cheat-sheet/)
+- [r-bloggers.com: How to use R Markdown (part one)](https://www.r-bloggers.com/2022/02/how-to-use-r-markdown-part-one/) R Markdown is a dynamic file format that allows you to make documents containing normal text alongside chunks of embedded R code. 
 
 ## Kafka
 - [codingharbour.com: kafkacat cheatsheet](https://codingharbour.com/kafkacat-cheatsheet/) Kafkacat is a versatile tool for producing and consuming messages, as well as exploring the cluster and topic metadata. Download the 1-page cheatsheet to get the most out of this awesome CLI tool.
diff --git a/docs/web-servers.md b/docs/web-servers.md
index 4103f9a9..6ddd3e94 100644
--- a/docs/web-servers.md
+++ b/docs/web-servers.md
@@ -65,7 +65,7 @@
   <summary>Click to expand!</summary>
 
 <center>
-<iframe src="https://www.youtube.com/embed/KZFkssRuBLE" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
+<iframe width="560" height="315" src="https://www.youtube.com/embed/KZFkssRuBLE" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
 </center>
 </details>