HTML视频播放器可播放GridFS大视频但无法加载小视频问题

• 1GB、500MB级别的大视频可正常播放，60MB及以下的小视频无法加载，连元数据都读取失败
  • 小视频加载异常状态截图
  • 元数据加载失败状态截图
  • 大视频正常加载状态截图

<video src="${url}" style="width:100% !important; height: inherit; background: black;" controls autoplay muted preload="metadata"></video>

• 调整响应头的Content-Range字段值、修改响应状态码，均无法解决问题

route.get('/video/:id', async (req, res) => {
const { id } = req.params;
const range = req.headers.range;
    console.log(range);
    if (!range || range === undefined) {
    res.writeHead(416,{
        "Content-Range":`bytes */*`
    }).send("Requires Range header");
    return;
    }
    try {
        const cursor = await bucket.find({ "_id": id });
        let size, type;
        await cursor.forEach(document => {
        size = document.length;
        type = document.metadata.mimeType;
        });
        let CHUNK_SIZE = 1024 *1024 ; // 1MB
        let start = Number(range.replace(/\D/g, ""));
        const end = Math.min(start + CHUNK_SIZE, size-1);
        if(start>=size || start===end){
        res.writeHead(416,{
            "Content-Range":`bytes */${size}`
        })
        return res.end();
        }
        try {
        const downloadStream = await bucket.openDownloadStream(id, {
            start: start,
            end: end
        });
        const contentLength = end - start;
        const headers = {
            "Content-Range": `bytes ${start}-${end}/${size}`,
            "Accept-Ranges": "bytes",
            "Content-Length": contentLength,
            "Content-Type": "video/mp4",
        };
        res.writeHead(206, headers);
        downloadStream.pipe(res);
        } catch (err) {
        console.log('Error: ' + err);
        res.status(416).send();
        }
    } catch (err) {
        console.log('Error: ' + err);
        res.status(416).send();
    }
});

内容的提问来源于stack exchange，提问作者moz