fix

app/views/courses/own_watch_histories.json.jbuilder

@@ -3,7 +3,7 @@ json.data do
     json.watch_course_video_id d['watch_course_video_id']
     json.title d.title
     json.user_name d.video.user&.real_name
-    json.is_finished d.is_finished ? true : false
+    json.is_finished d.is_finished == 1 ? true : false
     json.total_duration d.total_duration.round(0)
     json.freq d['freq']
     json.start_at d.start_at.to_s