video

The page is checking what this browser can play

The first answer comes from what the browser reports about itself. The page reads it in about a second, without downloading any video.

Tests to run

The quick set checks HEVC in the common formats and delivery paths, plus H.264 as a file and over HLS in MPEG-TS, VP9 in WebM, AAC audio and the network.

The waveform is synthetic. It is not patient data.

Playback monitor

The quick set is ready to run.

0:00

Each video test plays here.

The trace draws one spike for every video frame the browser shows. A gap means the browser dropped frames.

A flat line means no frames arrived.