DocumentationAnalytics

Media session ID

Last update: May 12, 2026

CREATED FOR:

  • User
  • Admin

The Media session ID dimension uniquely identifies each playback session. It is generated by the backend and stamped on every event for the session. Use it to isolate the events of a single session for debugging or to deduplicate sessions in custom analyses.

How this dimension is populated

The session ID is generated automatically when the backend receives a media.sessionStart event. Web SDK and Mobile SDK implementations capture and persist the ID for you; direct API implementations must read the session ID from the sessionStart response (the Location header for the Media Collection API, or the media-analytics:new-session handle for the Media Edge API) and include it on subsequent events.

Reporting system
Source
Adobe Analytics
Create a Processing rule that maps a.media.vsid to an eVar.
Customer Journey Analytics
mediaReporting.sessionDetails.ID
Data feeds
videosessionid, post_videosessionid

Dimension items

Each item is a unique session ID generated by the backend (typically a 22-character alphanumeric string). Use the Filter or Search field to look up a specific session.

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