Update README.md

README.md

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 ### Description
 
+#### Up to version 1.1.0:
 Saves all channel- and videonames from a public Youtubeplaylist into a textfile. 
 If there are already texfiles existing for that playlist-ID the last textfile will be compared to the current date. 
 Possibly missing videos will then be printed at the bottom of the new textfile. 
+
+#### Since version 2.0.0
+Python script that retrieves all videos form a given youtube playlist and downloads them via youtube-dl.
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