为什么我无法使用Python下载所有视频？

Question

我在网址中有一个视频，我想用Python下载它。 这里的问题是，当我执行脚本并下载它时，最终文件只有1 kb，它就像从未开始下载过程一样。

我试过我在https://stackoverflow.com/a/16696317/5280246中看到的这个解决方案：

    url_video = "https://abiu-tree.fruithosted.net/dash/m/cdtsqmlbpkbmmddq~1504839971~190.52.0.0~w7tv1per/init-a1.mp4"
    rsp = requests.get(url_video, stream=True)
    print("Downloading video...")
    with open("video_test_10.mp4",'wb') as outfile:
        for chunk in rsp.iter_content(chunk_size=1024):
            if chunk:
                outfile.write(chunk)
    rsp.close()

我尝试过这样：

url_video = "https://abiu-tree.fruithosted.net/dash/m/cdtsqmlbpkbmmddq~1504839971~190.52.0.0~w7tv1per/init-a1.mp4"
rsp = requests.get(url_video)
with open("out.mp4",'wb') as f:
     f.write(rsp.content)

我也尝试过：

urllib.request.retrieve(url_video, "out.mp4")