Added a Python plugin to continously monitor our clipboard to start the download automatically

python_plugin/README.md

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+# Youtube-dl plugin to automatically start your download:
+A Python script to constantly watch your clipboard content, and download if its a youtube link!
+
+
+#Python Libraries you might need to install:
+	-> Pyperclip
+	
+#Steps to setup:
+1. Install Pyperclip python plugin
+2. Place youtube.py in the same folder where your youtube-dl executable(by rg3) is there
+3. Make sure the name of the downloader executable is youtube.exe
+4. Run Youtube.py
+
+#Screenshot:
+![alt tag](https://raw.githubusercontent.com/vishnugt/youtube_dl-plugin/master/screenshot.png)
+
+# You are good to go!
+
+So from now on, if you copy a youtube link it will automatically start to download the video!
+Cheers :)
+
+
+Thanks rg3 for youtube-dl and making it as open source!

python_plugin/youtube.py

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+import time
+import threading
+import os
+import subprocess
+import sys
+
+
+import pyperclip
+
+def is_url_but_not_bitly(url):
+    if url.startswith("https://www.youtube.com"):
+        return True
+    return False
+
+def print_to_stdout(clipboard_content):
+    print "     Yosh! Found an URL"
+    tempstring = str(clipboard_content)
+    pyperclip.copy('')
+    print "     Launching youtube-dl to download"
+    with open(os.devnull, "w") as fnull:
+        subprocess.call("start youtube "+tempstring, stdout = fnull, stderr = fnull, shell = True)
+    
+class ClipboardWatcher(threading.Thread):
+    def __init__(self, predicate, callback, pause=5.):
+        super(ClipboardWatcher, self).__init__()
+        self._predicate = predicate
+        self._callback = callback
+        self._pause = 5
+        self._stopping = False
+
+    def run(self):       
+        recent_value = ""
+        while not self._stopping:
+            tmp_value = pyperclip.paste()
+            if tmp_value != recent_value:
+                recent_value = tmp_value
+                if self._predicate(recent_value):
+                    self._callback(recent_value)
+            time.sleep(self._pause)
+
+    def stop(self):
+        self._stopping = True
+
+def main():
+    watcher = ClipboardWatcher(is_url_but_not_bitly, 
+                               print_to_stdout,
+                               5.)
+    watcher.start()
+    while True:
+        try:
+            print "Waiting for a youtube URL..."
+            time.sleep(10)
+        except KeyboardInterrupt:
+            watcher.stop()
+            break
+
+
+if __name__ == "__main__":
+    main()