Want to use different tracking url by mediafile

[kyungtae]

In DSP side, I want to know what mediafile was played among multiple files. ChatGPT 4o replied below as an answer. Is it valid method?
If not, is there any other method ?

<VAST version="3.0">
  <Ad id="12345">
    <InLine>
      <Creatives>
        <Creative>
          <Linear>
            <Duration>00:00:30</Duration>
            <TrackingEvents>
              <Tracking event="start">
                <![CDATA[http://tracking.example.com/start?file=video1]]>
              </Tracking>
              <Tracking event="start">
                <![CDATA[http://tracking.example.com/start?file=video2]]>
              </Tracking>
            </TrackingEvents>
            <MediaFiles>
              <MediaFile id="video1" delivery="progressive" type="video/mp4" bitrate="1500" width="640" height="360">
                <![CDATA[http://example.com/video1.mp4]]>
              </MediaFile>
              <MediaFile id="video2" delivery="progressive" type="video/mp4" bitrate="1500" width="1280" height="720">
                <![CDATA[http://example.com/video2.mp4]]>
              </MediaFile>
            </MediaFiles>
          </Linear>
        </Creative>
      </Creatives>
    </InLine>
  </Ad>
</VAST>