A separate page. A separate media host.
Live text over an externally loaded video. This is a diagnostic page, not the starship artwork or the finished homepage.
Both links open a harmless confirmation page on this test host.
JavaScript has not started. Static image shown.
The desktop test attempts muted playback of MDN’s public flower sample. Small screens, reduced-motion preferences and detected data-saving preferences start with the poster. The sample is for testing only. No soundtrack is included.
These external files belong to MDN’s HTML video example. They do not test your future media account.
This build accepts MDN, b-cdn.net and r2.dev media URLs only, without passwords, tokens or query strings. Other hosts need a reviewed code change. An r2.dev test does not validate production CDN delivery. Do not paste a storage access key or private URL.
Reports include the current source and snapshots of previous source tests from this page session. Reloading clears the history. Nothing is submitted to us.
This page contains no analytics, login or submission service. Page and media hosts still receive normal web requests and may keep their own logs. Reports omit full media paths and any tokens.
