diff --git a/app.rb b/app.rb
index 6fc6989..3211a8f 100644
--- a/app.rb
+++ b/app.rb
@@ -1151,7 +1151,7 @@
         "id" => video["id"],
         "created_at" => video["created_at"],
         "published_at" => video["published_at"],
-        "is_live" => !video.has_key?("thumbnail_url"),
+        "is_live" => video["thumbnail_url"].empty?,
         "type" => video["type"],
         "title" => video["title"].strip,
         "description" => video["description"].strip,
@@ -1192,7 +1192,7 @@
         "id" => video["id"],
         "created_at" => video["created_at"],
         "published_at" => video["published_at"],
-        "is_live" => !video.has_key?("thumbnail_url"),
+        "is_live" => video["thumbnail_url"].empty?,
         "type" => video["type"],
         "title" => video["title"].strip,
         "description" => video["description"].strip,