Modify usage of videoinfo

pytchat/tool/downloader.py

@@ -5,10 +5,11 @@ import traceback
 from urllib.parse import quote
 
 from . import parser
+from . import videoinfo
 from .. import config
 from .. import util
 from .. paramgen import arcparam
-
+from ..exceptions import InvalidVideoIdException
 logger = config.logger(__name__)
 headers=config.headers
 
@@ -268,4 +269,4 @@ def check_duplicate(blocks):
     for i in range(len(blocks)-1):
         if  ( is_same_offset(i) and is_same_id(i) and is_same_type(i) ):
             ret.append(blocks[i])
-    return ret
+    return ret