用的云点播sdk https://cloud.tencent.com/document/product/266/18177

VodUploader.start({
    mediaFile: videoFile, //必填，把chooseVideo回调的参数(file)传进来
    getSignature: getSignature, //必填，获取签名的函数

    mediaName: fileName, //选填，视频名称，强烈推荐填写(如果不填，则默认为“来自微信小程序”)
    coverFile: coverFile, // 选填，视频封面
    success: function(result) {
        console.log('success');
        console.log(result);
    },
    error: function(result) {
        console.log('error');
        console.log(result);
        wx.showModal({
            title: '上传失败',
            content: JSON.stringify(result),
            showCancel: false
        });
    },
    progress: function(result) {
        console.log('progress');
        console.log(result);
    },
    finish: function(result) {
        console.log('finish');
        console.log(result);
        wx.showModal({
            title: '上传成功',
            content: 'fileId:' + result.fileId + '\nvideoName:' + result.videoName,
            showCancel: false
        });
    }
});