import os
import requests
import datetime
from Crypto.Cipher import AES

def decode_key_file(key_file_name):
    with open(key_file_name,"r") as f:
        data=f.read()
    return data
def decode_m_file(m_file_name):
    with open(m_file_name,"r") as f:
        data=f.read()
    return data.split("\n")[6::2]

def decode_video(filename):
    data_list=[[],[],[]]
    file_list=os.listdir(filename)
    for one_file_name in file_list:
        if "m3u8" in one_file_name:
            data_list[0].append(filename+"/"+one_file_name)
        elif "key" in one_file_name:
            data_list[1].append(filename + "/" + one_file_name)
        else:
            data_list[2].append(filename + "/" + one_file_name)
    key=decode_key_file(data_list[1][0])
    name_list=decode_m_file(data_list[0][0])

    for one_name in name_list:
        for path_name in data_list[2]:
            if one_name in path_name:
                with open(path_name,"rb") as f:
                    data_name=f.read()

                if len(key):  # AES 解密
                    cryptor = AES.new(key, AES.MODE_CBC, key)
                    with open(key + ".mp4", 'ab') as f:
                        f.write(cryptor.decrypt(data_name))


if __name__ == '__main__':
    decode_video("./data")

视频下载下来如下图所示

https://ngmov.me/?channelCode=ngdl50
这个应用下载下来的视频就是这样的解法

改进版本

def decode_key_file(key_file_name):
    with open(key_file_name, "r") as f:
        data = f.read()
    return data


def decode_m_file(m_file_name):
    with open(m_file_name, "r") as f:
        data = f.read()
    return data.split("\n")[6::2]


def decode_video(filename):
    data_list = [[], [], []]
    file_list = os.listdir(filename)
    for one_file_name in file_list:
        if "m3u8" in one_file_name:
            data_list[0].append(filename + "/" + one_file_name)
        elif "key" in one_file_name:
            data_list[1].append(filename + "/" + one_file_name)
        else:
            data_list[2].append(filename + "/" + one_file_name)
    try:
        key = decode_key_file(data_list[1][0])
    except:
        key = one_file_name
    name_list = decode_m_file(data_list[0][0])

    for one_name in name_list:
        for path_name in data_list[2]:
            if one_name in path_name:
                with open(path_name, "rb") as f:
                    data_name = f.read()

                if len(key):  # AES 解密
                    cryptor = AES.new(key, AES.MODE_CBC, key)
                    with open(key + ".mp4", 'ab') as f:
                        f.write(cryptor.decrypt(data_name))
                else:
                    with open(key + ".mp4", 'ab') as f:
                        f.write(data_name)
                        f.flush()


if __name__ == '__main__':
    data_list = os.listdir("/home/dfy/Videos/Download")
    index=0
    for path_one in data_list:
        index+=1
        if index<18:
            continue
        decode_video("/home/dfy/Videos/Download" + "/" + path_one)