Add URL download endpoint for Studio video uploads

The endpoint returns an Excel-dialect CSV file for download.

cms/djangoapps/contentstore/models.py

@@ -0,0 +1,32 @@
+"""
+Models for contentstore
+"""
+
+from django.db.models.fields import TextField
+
+from config_models.models import ConfigurationModel
+
+
+class VideoEncodingDownloadConfig(ConfigurationModel):
+    """Configuration for what to include in video encoding downloads"""
+    profile_whitelist = TextField(
+        blank=True,
+        help_text="A comma-separated list of names of profiles to include in video encoding downloads"
+    )
+    status_whitelist = TextField(
+        blank=True,
+        help_text="A comma-separated list of status values; only videos with these status values will be included in video encoding downloads"
+    )
+
+    @classmethod
+    def get_profile_whitelist(cls):
+        """Get the list of profiles to include in the encoding download"""
+        return [profile for profile in cls.current().profile_whitelist.split(",") if profile]
+
+    @classmethod
+    def get_status_whitelist(cls):
+        """
+        Get the list of status values to include files for in the encoding
+        download
+        """
+        return [status for status in cls.current().status_whitelist.split(",") if status]