chore: Translate transifex_input.json in de_DE

88% of minimum 50% translated source file: 'transifex_input.json'
on 'de_DE'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

translations/frontend-app-course-authoring/src/i18n/messages/de_DE.json

@@ -325,6 +325,7 @@
   "course-authoring.files-and-uploads.file-info.usage.title": "Verwendung",
   "course-authoring.files-and-uploads.file-info.usage.loading.message": "Ladevorgang",
   "course-authoring.files-and-uploads.file-info.usage.notInUse.message": "Derzeit nicht im Einsatz",
+  "course-authoring.files-and-uploads.cardMenu.copyVideoIdTitle": "Copy video ID",
   "course-authoring.files-and-uploads.cardMenu.copyStudioUrlTitle": "Studio-URL kopieren",
   "course-authoring.files-and-uploads.cardMenu.copyWebUrlTitle": "Web-URL kopieren",
   "course-authoring.files-and-uploads.cardMenu.downloadTitle": "Herunterladen",