

Player Startup Time measures the time from when the player is first initialized in the page to when it is ready to receive further instructions. Preloading the video data before the viewer clicks play can also have a positive impact on this metric, however this should only be done when the video is the primary piece of content. Network performance and initial rendition selection have the greatest impact on this number. Our data shows that viewers can be very impatient when waiting for a video to start, leaving in as little as two seconds for certain content types. 95th Percentile – Helps understand what a poorer experience is like on your platform, while excluding outliers and happening frequently enough (1 in 20 views) to always be worth your attention.Median (50th Percentile) – Helps understand a typical experience (half are better than this number, half are worse).Mux provides two percentiles of this metric: In the case that the player is configured with a pre-roll ad, Video Startup Time is the time until the first frame of the pre-roll ad is displayed. It specifically measures from when the player has been instructed to play the video, either directly by the user or via autoplay, to when the first frame of video is showing and the playhead is progressing. Video Startup Time measures the time that the viewer waits for the video to play after the page is loaded and the player is ready. Find areas where startup time can be optimized and improved.


Note that EBVS views do not receive a Startup Time Score. This score decreases at a greater rate after 500ms of starting up. 8 8 + s t a r t u p _ t i m e _ i n _ s e c o n d s ∗ 100 \frac * 100 8 + s t a r t u p _ t im e _ in _ seco n d s 8 ∗ 100
