Skip duplicate downloads

yt-unlist-saver.py

@@ -67,16 +67,14 @@ ydl_opts = {
   'outtmpl': '{}/%(uploader)s-%(title)s-%(id)s.%(ext)s'.format(playlistDir)
 }
 for v in filteredVideos:
-  print(getYear(v), getId(v))
-  videoURL = 'https://www.youtube.com/watch?v='+getId(v)
-  with youtube_dl.YoutubeDL(ydl_opts) as ydl:
-    ydl.download([videoURL])
 
   # Save metadata to file
-    description = open('{}/{}-{}-{}.txt'.format(playlistDir,
+  descriptionFile = '{}/{}-{}-{}.txt'.format(playlistDir,
                                               getChannel(v),
                                               getTitle(v),
-                                                getId(v)), 'w')
+                                              getId(v))
+  if not os.path.exists(descriptionFile):
+    description = open(descriptionFile, 'w')
     description.write('Title: ' + getTitle(v) + '\n')
     description.write('Uploaded: ' + getUploadTime(v) + '\n')
     description.write('Channel: ' + getChannel(v) + '\n')
@@ -85,3 +83,8 @@ for v in filteredVideos:
     description.write('Tags: ' + getTags(v) + '\n')
     description.write('Video ID: ' + getId(v) + '\n')
     description.close()
+    
+    videoURL = 'https://www.youtube.com/watch?v='+getId(v)
+    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
+      ydl.download([videoURL])
+