Correction affichage création des liens

src/Form/MediaVideoType.php

@@ -16,8 +16,8 @@ class MediaVideoType extends AbstractType
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
         $builder->add('url', TextType::class, array(
-            'label' => 'Url de la vidéo',
-            'required'  =>false
+            'label'     => false,
+            'row_attr'  => ['class' =>  'input-group']
         ));
     }/**
      * {@inheritdoc}