Youtube_dl：错误：YouTube 说：无法提取视频数据

Question

我正在使用 Python 3 制作一个小图形界面，它应该下载一个 youtube 视频及其 URL。我youtube_dl为此使用了该模块。这是我的代码：

import youtube_dl # Youtube_dl is used for download the video

ydl_opt = {"outtmpl" : "/videos/%(title)s.%(ext)s", "format": "bestaudio/best"} # Here we give some advanced settings. outtmpl is used to define the path of the video that we are going to download

def operation(link):

    """

    Start the download operation

    """

    try:

        with youtube_dl.YoutubeDL(ydl_opt) as yd: # The method YoutubeDL() take one argument which is a dictionary for changing default settings

            video = yd.download([link]) # Start the download

        result.set("Your video has been downloaded !")

    except Exception:

        result.set("Sorry, we got an error.")

operation("https://youtube.com/watch?v=...")

当我执行我的代码时，出现以下错误：

ERROR: YouTube said: Unable to extract video data

我看到这里是因为没有找到任何视频信息，我该如何解决这个问题？