Update README

README.md

@@ -48,12 +48,27 @@ Now you can run the script
 $ python3 -m delarte --help
 or
 $ delarte --help
-ArteTV downloader.
+delarte - ArteTV downloader.
 
-usage: delarte [-h|--help]                            - print this message
-   or: delarte program_page_url                       - show available versions
-   or: delarte program_page_url version               - show available resolutions
-   or: delarte program_page_url version resolution    - download the given video
+Usage:
+  delarte (-h | --help)
+  delarte --version
+  delarte [options] URL
+  delarte [options] URL RENDITION
+  delarte [options] URL RENDITION VARIANT
+
+Download a video from ArteTV streaming service. Omit RENDITION and/or
+VARIANT to print the list of available values.
+
+Arguments:
+  URL         the URL from ArteTV website
+  RENDITION   the rendition code [audio/subtitles language combination]
+  VARIANT     the variant code [video quality version]
+
+Options:
+  -h --help   print this message
+  --version   print current version of the program
+  --debug     on error, print debugging information
 ```
 
 🔧 How it works