Code:

from bs4 import BeautifulSoup
from urllib.parse import unquote
import re
import requests

html_url = '<http://www.5278.mobi/>??????.html' #html_url ,please replace it

def get_video(html_url):
    r = requests.get(html_url).text
    r = BeautifulSoup(r, 'html.parser')
    iframe_url = r.iframe['src']
    r = requests.get(iframe_url).text
    pattern = r'\\brand\\b.\\d*&'
    r = re.sub(pattern, '', r)
    pattern = r'\\bget3.php\\b.id=\\w*'
    api_url = '<https://v.5278.mobi/api/>' + re.search(pattern, r).group(0)
    headers = {
        'Host': 'v.5278.mobi',
        'Accept-Encoding': 'gzip, deflate',
        'Connection': 'keep-alive',
        'Accept': '*/*',
        'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/604.3.5 (KHTML, like Gecko) Version/11.0.1 Safari/604.3.5',
        'Accept-Language': 'zh-cn',
        'Referer': iframe_url,
        'DNT': '1'
    }
    r = requests.get(api_url, headers=headers).text
    html_unescape = unquote(r)
    video_url = BeautifulSoup(html_unescape, 'html.parser').source['src']
    pattern = r'\\\\'
    video_url = eval(re.sub(pattern, '', video_url))
    return video_url

We can get direct video link in this way

Notice⚠️

There are two kinds of direct link, one is in m3u8 (vast majority), the other is mp4

The direct link of mp4 format cannot download or open directly, so we need set a header

Referer : api_url