Make it possible to extract video id from url

pytchat/tool/extract/extractor.py

@@ -3,6 +3,7 @@ from . import duplcheck
 from .. videoinfo import VideoInfo
 from ... import config
 from ... exceptions import InvalidVideoIdException
+from ... util.extract_video_id import extract_video_id
 
 logger = config.logger(__name__)
 headers = config.headers
@@ -14,7 +15,7 @@ class Extractor:
             raise ValueError('div must be positive integer.')
         elif div > 10:
             div = 10
-        self.video_id = video_id
+        self.video_id = extract_video_id(video_id)
         self.div = div
         self.callback = callback
         self.processor = processor