Understanding Lifetime Metrics

This article provides a definition and overview of Stream Analytics that appears under the ‘Lifetime Metrics’. 

You can find the lifetime metrics on your videos if you have enabled Streams within the platform. Once enabled, navigate to ‘Analytics’ > ‘Stream

What are the metrics?


A title is provided for your video. The filename can be used as a default title. The functionality to change your video title will come in future platform improvements.


The length of your video is detected when a viewer reaches the end of the stream. If you haven’t finished the stream, or nobody has watched the video until the end, then it will not be possible to detect the length of the video. The best option is to test the stream from start to finish before promoting it to your audience. This will allow you to check for quality issues, as well as provide a full view of our metrics engine.


This is the average amount of time your users watch the stream. 

For more information see: Understanding Video Engagement

View count

Lifetime views are all views collected by the video player. 

Smoothness score

The smoothness score measures the amount of rebuffering a viewer sees when watching a video. A higher smoothness score means the user sees less (or no) rebuffering, while a lower score means a user sees more rebuffering.

Startup time score

Startup time score estimates how happy or unhappy viewers are with the startup time. Longer startup times mean lower scores, while shorter startup times mean higher scores. Once startup time reaches a certain point (around 8 seconds), the rate of score decay decreases since additional seconds of startup after this point become less impactful.

Video quality score

The video quality score measures the visual quality a user sees by comparing the resolution of a video stream to the resolution of the player in which it is played. If a video stream is significantly upscaled, quality generally suffers, and viewers have an unacceptable experience.

Note that video quality is notoriously difficult to quantify, especially in a reference-free way (without comparing a video to a pristine master). Bitrate doesn't work, since the same bitrate may look excellent on one video and terrible on another.

Several factors contribute to actual video quality: bitrate, codec, content type, and the quality of the original source. However, if the content is encoded well and at the right bitrates, upscaling tracks reasonably well to video quality.

When are metrics collected?

Lifetime metrics are collected for each video starting with the first view. 

Often a video is previewed using our platform, so metrics might be available before the video is published online.