Regarding the start and End time of the videos

[Tech-Prophecy]

For the first video id in the ted384-metadata.csv dataset, which is a 20 min video but the start and end time is 16609 and 16737. How does 20 min video have this as the time limits of the clip as these are mostly for videos extending for more than 2-3 hrs. Moreover when I tried to download the clip using the time limits I am getting a 0s video which couldn't be useful. Please clarify,

[AliaksandrSiarohin]

16609 / 30 (fps) / 60 (sec in min) ~= 9 min.