diff --git a/src/MiniDocs/HedgeDoc.class.st b/src/MiniDocs/HedgeDoc.class.st
index 971180a..68df84e 100644
--- a/src/MiniDocs/HedgeDoc.class.st
+++ b/src/MiniDocs/HedgeDoc.class.st
@@ -129,3 +129,22 @@ HedgeDoc >> url: anObject [
 HedgeDoc >> visit [
 	WebBrowser openOn: self server, '/', self pad.
 ]
+
+{ #category : #transformation }
+HedgeDoc >> youtubeEmbeddedLinksToMarkdeepFormat [
+	"I replace the youtube embedded links from hedgedoc format to markdeep format."
+	| linkDataCollection |
+	linkDataCollection := (HedgeDocGrammar new youtubeEmbeddedLink parse: self contents) 
+	collect: [ :each | | parsedLink | 
+		parsedLink := OrderedCollection new.
+		parsedLink
+			add: ('' join:( each collect: [ :s | s value]));
+			add: '![](https://youtu.be/', 
+				each second value trimmed , ')';
+			add: (each first start to: each third stop);
+			yourself ].
+	linkDataCollection do: [ :each |
+		self contents: (self contents 
+			copyReplaceAll: each first with: each second) ].
+	^ self
+]
diff --git a/src/MiniDocs/HedgeDocExamples.class.st b/src/MiniDocs/HedgeDocExamples.class.st
new file mode 100644
index 0000000..9cbb293
--- /dev/null
+++ b/src/MiniDocs/HedgeDocExamples.class.st
@@ -0,0 +1,36 @@
+Class {
+	#name : #HedgeDocExamples,
+	#superclass : #Object,
+	#category : #'MiniDocs-Examples'
+}
+
+{ #category : #accessing }
+HedgeDocExamples >> hedgeDocReplaceYoutubeEmbeddedLinkExample [
+	<gtExample>
+	| aSampleString hedgedocDoc parsedCollection hedgedocDocLinksReplaced |
+	aSampleString := '---
+breaks: false
+
+---
+	
+# Titulo
+	
+Un texto de ejemplo
+	
+# Enlaces youtube
+	
+{%youtube 1aw3XmTqFXA %}
+	
+otro video
+	
+{%youtube U7mpXaLN9Nc %}'.
+	hedgedocDoc := HedgeDoc new 
+		contents: aSampleString.
+	hedgedocDocLinksReplaced := HedgeDoc new contents: aSampleString; youtubeEmbeddedLinksToMarkdeepFormat.
+	self assert: (hedgedocDoc contents 
+		includesSubstring: '{%youtube 1aw3XmTqFXA %}' ).
+	self assert: (hedgedocDocLinksReplaced contents 
+		includesSubstring: '![](https://youtu.be/1aw3XmTqFXA)' ).
+	^ { 'Original' -> hedgedocDoc .
+	'Replaced' -> hedgedocDocLinksReplaced } asDictionary
+]
diff --git a/src/MiniDocs/HedgeDocGrammar.class.st b/src/MiniDocs/HedgeDocGrammar.class.st
index 764b410..f94395a 100644
--- a/src/MiniDocs/HedgeDocGrammar.class.st
+++ b/src/MiniDocs/HedgeDocGrammar.class.st
@@ -9,11 +9,34 @@ Class {
 
 { #category : #accessing }
 HedgeDocGrammar >> start [
-	^ #any asPParser starLazy
+	| any |
+	any := #any asPParser.
+	^ (self yamlMetadata / any starLazy), youtubeEmbeddedLink
+]
+
+{ #category : #accessing }
+HedgeDocGrammar >> yamlMetadata [
+	"I parse the header of the hedgedoc document for YAML metadata."
+	^ '---' asPParser token, #any asPParser starLazy token, '---' asPParser token
 ]
 
 { #category : #accessing }
 HedgeDocGrammar >> youtubeEmbeddedLink [
-	"I parse a youtube embedded link in a hedgedoc document."
-	^ '{%youtube' asPParser token trim, #any asPParser starLazy token, '%}' asPParser token trim
+	"I parse the youtube embedded links in a hedgedoc document."
+	| link linkSea |
+	link := self youtubeEmbeddedLinkOpen, 
+		#any asPParser starLazy token, 
+		self youtubeEmbeddedLinkClose.
+	linkSea := link islandInSea star.
+	^ linkSea
+]
+
+{ #category : #accessing }
+HedgeDocGrammar >> youtubeEmbeddedLinkClose [
+	^ '%}' asPParser token
+]
+
+{ #category : #accessing }
+HedgeDocGrammar >> youtubeEmbeddedLinkOpen [
+	^ '{%youtube' asPParser token
 ]
diff --git a/src/MiniDocs/HedgeDocGrammarExamples.class.st b/src/MiniDocs/HedgeDocGrammarExamples.class.st
new file mode 100644
index 0000000..c491e34
--- /dev/null
+++ b/src/MiniDocs/HedgeDocGrammarExamples.class.st
@@ -0,0 +1,19 @@
+Class {
+	#name : #HedgeDocGrammarExamples,
+	#superclass : #Object,
+	#category : #'MiniDocs-Examples'
+}
+
+{ #category : #accessing }
+HedgeDocGrammarExamples >> hedgeDocParseYoutubeEmbeddedLinkExample [
+	<gtExample>
+	| aSampleString parsedStringTokens parsedCollection |
+	aSampleString := '{%youtube 1aw3XmTqFXA %}'.
+	parsedStringTokens := HedgeDocGrammar new youtubeEmbeddedLink parse: aSampleString.
+	parsedCollection := parsedStringTokens first.
+	self assert: parsedCollection size equals: 3.
+	self assert: parsedCollection first value equals: '{%youtube'.
+	self assert: parsedCollection second class equals: PP2Token.
+	self assert: parsedCollection third value equals: '%}'.
+	^ parsedStringTokens
+]