The events duration do not represent their actual duration

[bdlukaa]

Currently, the duration of the events is calculated by the following formula: published date - update date. This leads to incorrect values.

This duration is returned from the server and is much more accurate. When parsing events, use eventObject['content']['media_duration'] to get the event duration.

Additional context

https://github.com/bluecherrydvr/bluecherry-apps/pull/712#event-15336224931