feat: initialize aivideo project

backend/app/workers/tasks_video_submit.py

@@ -0,0 +1,7 @@
+from app.workers.celery_app import celery_app
+
+
+@celery_app.task(name="video.submit")
+def submit_video_task(task_id: int) -> int:
+    return task_id
+