What is the difference between AV - Playbacks and AV - Plays?

We have two distinct metrics to analyze the number of playbacks performed:

• AV - Playbacks: Number of Audio/Video sessions for which content was consumed.

  The consumed time is calculated as the sum of the difference between "av_duration" and "av_previous_duration" in the hits sent for an Audio/Video session.

  If the time consumed is "0", then the session will not be taken into account in this calculation.

• AV - Sessions: Number of Audio/Video sessions. A session is created from the first Audio/Video event, even if no Audio/Video content was consumed. A session is closed after a STOP. As soon as the content consumed changes, a session is created.

Those metrics have to be distinguished from the metrics AV - Plays, which is simply the number of "av.plays" (or "rm.play") events over all Audio/Video sessions and playbacks. This corresponds to the number of clicks on a play button, at start of a playback or to resume playing content after pausing for example.