<!-- index.ttml -->
<button type="primary" bindtap="chooseVideo">选择视频</button>
<view>
  <view>{{description}}</view>
  <video src="{{videoSrc}}" controls="true"></video>
</view>

// index.js
Page({
  data: {
    videoSrc: "",
    description: "",
  },
  chooseVideo() {
    tt.chooseVideo({
      sourceType: ["album", "camera"],
      compressed: true,
      success: (res) => {
        let { duration, width, height, size } = res;
        this.setData({
          videoSrc: res.tempFilePath,
          description: `视频时长：${duration}s; 视频宽度：${width}px; 视频高度：${height}px; 视频大小：${size}B`,
        });
      },
      fail: (err) => {
        let errType = err.errMsg.includes("chooseVideo:fail cancel")
          ? "取消选择"
          : "选择失败";
        tt.showModal({
          title: errType,
          content: err.errMsg,
          showCancel: false,
        });
      },
      complete: () => {
        console.log("完成选择");
      },
    });
  },
});