Update video.ipynb

Use the function's input parameter in the code

list_files_from_zip_url(zip_url) - zip_url is not used in the code, but it seems like it should be used instead of the global variable URL

Author: natravedrova

site/en/tutorials/load_data/video.ipynb

@@ -188,7 +188,7 @@
         "      List of files in each of the classes.\n",
         "  \"\"\"\n",
         "  files = []\n",
-        "  with rz.RemoteZip(URL) as zip:\n",
+        "  with rz.RemoteZip(zip_url) as zip:\n",
         "    for zip_info in zip.infolist():\n",
         "      files.append(zip_info.filename)\n",
         "  return files"