[TASK] Change heading hierarchy for SEO purposes

Resources/Private/Templates/Youtube/Index.html

@@ -10,9 +10,9 @@
 					</f:if>
 					<f:if condition="{feedItem.title}">
 						<div class="sg-youtube-title">
-							<h4 class="h4">
+							<h3 class="h3">
 								{feedItem.title}
-							</h4>
+							</h3>
 						</div>
 					</f:if>
 					<f:if condition="{feedItem.description}">
@@ -24,4 +24,4 @@
 			</li>
 		</f:for>
 	</ul>
-</f:section>
+</f:section>
\ No newline at end of file