fix: Content fetching for articles and videos

erpnext/public/js/education/lms/components/Video.vue

@@ -50,7 +50,10 @@ export default {
     },
     methods: {
         getContent() {
-            return frappe.db.get_doc(this.type, this.content)
+            return lms.call('get_content', {
+                type: this.type,
+                content: this.content
+            })
         }
     }
 };