Add Video Duration to Photos API

[asteven5]

The Google Photos API does not return video duration. I would expect the API to return the length of the clip in minutes and seconds.

It would be very useful for a variety of reasons in different applications. Please make this available.

[jfschmakeit]

The Google Photos Library API does not return the duration of videos, that is why the client library also does not currently support this functionality.

There is a feature request open on the Library API issue tracker, please "star" it (or use the +1 button) on this request here to draw attention to it and be notified of any updates: https://issuetracker.google.com/123979425

Thank you!

(I'm closing this issue as this is a feature request for the API itself, rather than this particular client library.)