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-rw-r--r--youtube_dl/extractor/rai.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/youtube_dl/extractor/rai.py b/youtube_dl/extractor/rai.py
index b77b0a08e..077546a73 100644
--- a/youtube_dl/extractor/rai.py
+++ b/youtube_dl/extractor/rai.py
@@ -362,7 +362,8 @@ class RaiIE(RaiBaseIE):
webpage, 'content item id', default=None, group='id')
content_item_ids = set()
- content_item_ids.add(content_item_id)
+ if content_item_id:
+ content_item_ids.add(content_item_id)
if video_id not in content_item_ids:
content_item_ids.add(video_id)