Merge pull request #22858 from open-craft/video-field-parsing-fix

Fix: KeyError: 'source' when parsing HTML5 videos

common/lib/xmodule/xmodule/video_module/video_module.py

@@ -617,6 +617,8 @@ class VideoBlock(
         video_block = runtime.construct_xblock_from_class(cls, keys)
         field_data = cls.parse_video_xml(node)
         for key, val in field_data.items():
+            if key not in cls.fields:
+                continue  # parse_video_xml returns some old non-fields like 'source'
             setattr(video_block, key, cls.fields[key].from_json(val))
         # Don't use VAL in the new runtime:
         video_block.edx_video_id = None