wx.qy.shareToExternalMoments(
  {"text": {
    "content": "朋友圈 视频分发文案\n分发文案\n分发文案\n分发文案\n分发文案\n分发文案\n分发文案\n分发文案\n分发文案\n分发文案\n分发文案\n分发文案\n"
  },
  "attachments": [{
      "msgtype": "video",
      "video": {
        "mediaid": "3snayxDGGlp0UbCv1nMJg31MVu5lLRvK2wuccLMOc0NOAxpsBpwCRqlbxfSV5Xv90"
      }
    }]
)

报尺寸错误，换了几个视频都一样

1.21号还是好的