CDN での画像/動画ダウンロードが遅い — どうすればよいですか？

{/* /etc/resolv.conf */}
nameserver 1.1.1.1        # Cloudflare
nameserver 8.8.8.8        # Google
nameserver 223.5.5.5      # AliDNS
nameserver 119.29.29.29   # DNSPod

import httpx
import asyncio

async def download(url: str, path: str):
    async with httpx.AsyncClient(http2=True, timeout=120) as client:
        async with client.stream("GET", url) as resp:
            resp.raise_for_status()
            with open(path, "wb") as f:
                async for chunk in resp.aiter_bytes(chunk_size=1024 * 256):
                    f.write(chunk)

asyncio.run(download("<CDN URL>", "output.mp4"))

aria2c -x 8 -s 8 -k 1M --file-allocation=none "<CDN URL>"