feat: embed YT videos

Author: 0xLisanAlGaib

docs/tutorial/01-first-steps.md

@@ -17,6 +17,17 @@ socialImageTitle: Cadence First Steps
 socialImageDescription: Take your first steps to learn the Cadence smart contract programming language.
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+<div style={{ position: 'relative', paddingBottom: '56.25%', height: 0, overflow: 'hidden', maxWidth: '100%' }}>
+  <iframe 
+    style={{ position: 'absolute', top: 0, left: 0, width: '100%', height: '100%' }}
+    src="https://www.youtube.com/embed/Mtqs4JHjiyI" 
+    title="YouTube video player" 
+    frameborder="0" 
+    allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" 
+    allowfullscreen
+  ></iframe>
+</div>
+
 Welcome to our series of guides that get you up to speed on [Cadence] as quickly as possible! In this program, we jump right into making meaningful projects. Don't worry, we'll point you to the important parts of the language reference as each concept is introduced.
 
 This series makes use of the [Flow Playground], an online IDE that enables you to easily write and test Cadence code in a simulated environment.

docs/tutorial/02-hello-world.md

@@ -18,6 +18,17 @@ socialImageTitle: Hello World
 socialImageDescription: Write your own Hello World smart contract in Cadence.
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+<div style={{ position: 'relative', paddingBottom: '56.25%', height: 0, overflow: 'hidden', maxWidth: '100%' }}>
+  <iframe 
+    style={{ position: 'absolute', top: 0, left: 0, width: '100%', height: '100%' }}
+    src="https://www.youtube.com/embed/bAvlVE7Wd7w" 
+    title="YouTube video player" 
+    frameborder="0" 
+    allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" 
+    allowfullscreen
+  ></iframe>
+</div>
+
 It's time to write your own "Hello World" contract. In this instance, the contract accomplishes the following:
 
 1. Create and initialize a smart contract with a single field of type `String`.