fix start upload video to s3

apps/core/signals.py

@@ -8,7 +8,7 @@ from . import models, tasks, utils
 @receiver(post_save, sender=models.Video)
 def post_save_video(sender, instance, created, **kwargs):
     if instance.status == models.PROGRESS and instance.local_file:
-        tasks.send_video_to_s3.apply_async((instance.id,))
+        tasks.send_video_to_s3.delay((instance.id,))
 
 
 @receiver(post_save, sender=models.Playlist)