使用Chrome DevTools协议来获取视频性能指标，然后使用Python解析和分析这些指标

可以使用Python的Chrome DevTools Protocol库来获取视频性能指标，然后使用Python解析和分析这些指标。具体实现可以参考以下代码：

import json
import requests

# 发送命令到Chrome DevTools Protocol
def send_command(url, method, params={}):
    headers = {'Content-Type': 'application/json'}
    data = json.dumps({'method': method, 'params': params})
    resp = requests.post(url, headers=headers, data=data)
    resp.raise_for_status()
    return resp.json()

# 获取视频性能指标
def get_video_metrics(url):
    # 打开Chrome浏览器
    resp = send_command('http://localhost:9222/json/new', 'Target.createTarget', {'url': url})
    target_id = resp['result']['targetId']
    resp = send_command('http://localhost:9222/json', 'Target.attachToTarget', {'targetId': target_id, 'flatten': True})
    session_id = resp['result']['sessionId']
    resp = send_command(f'http://localhost:9222/json/session/{session_id}', 'Page.enable')
    resp = send_command(f'http://localhost:9222/json/session/{session_id}', 'Performance.enable')
    # 等待视频播放结束
    while True:
        resp = send_command(f'http://localhost:9222/json/session/{session_id}', 'Performance.getMetrics')
        metrics = resp['result']['metrics']
        if 'VideoPlaybackEnded' in metrics:
            break
    # 获取视频性能指标
    resp = send_command(f'http://localhost:9222/json/session/{session_id}', 'Performance.getMetrics')
    metrics = resp['result']['metrics']
    send_command(f'http://localhost:9222/json/session/{session_id}', 'Target.closeTarget', {'targetId': target_id})
    # 解析视频性能指标
    video_metrics = {}
    for metric in metrics:
        if metric['name'].startswith('Video'):
            video_metrics[metric['name']] = metric['value']
    return video_metrics

# 示例：获取百度视频的性能指标
url = 'https://v.baidu.com/test'
video_metrics = get_video_metrics(url)
print(video_metrics)

注意：在运行以上代码之前，需要先启动Chrome浏览器，并使用以下命令启动Chrome DevTools Protocol：

chrome --remote-debugging-port=9222