docs: improve docs for youtube extension (#2902)

* docs: improve docs for youtube extension

* docs: improve docs for youtube extension

Co-authored-by: Dominik Biedebach <dominik@bdbch.com>

demos/src/Extensions/Youtube/Vue/index.vue

@@ -9,12 +9,16 @@
         type="number"
         v-model="width"
         placeholder="width"
+        min="320"
+        max="1024"
       >
       <input
         id="height"
         type="number"
         v-model="height"
         placeholder="height"
+        min="180"
+        max="720"
       >
       <editor-content class="editor-1" :editor="editor" />
     </div>

docs/api/extensions/youtube.md

@@ -1,6 +1,6 @@
 ---
 description: Your favorite videos and jams - right in your editor!
-icon: video
+icon: youtube-line
 ---
 
 # YouTube