GX Video Viewer

GX Video Viewer is a client-side tool designed for developers, QA engineers, educators, and media analysts to inspect video playback directly from a URL or local source. It supports common media URLs (MP4, WebM) and streaming endpoints without requiring server-side processing. Users can specify a start_time and optional end_time to focus on a clip, and enable optional features such as captions and playback speed.
It operates by rendering a native HTML5 video element in the user's environment, keeping all processing on the client. The tool computes current_time, duration, and buffered ranges, and enforces the requested segment boundaries. It exposes a stable set of outputs for automation, including time progress, playback state, and buffering information, enabling reproducible tests and demos.
Because it is source-agnostic and runs offline in the browser, it benefits software teams validating embed logic, educators preparing demonstrations, and accessibility testers verifying captions handling. Its value lies in deterministic timing, precise segment playback, and non-destructive testing of how media apps respond to speed changes, pauses, and looping without server overhead.
Key differentiators include strict client-side isolation, minimal configuration, and clear input/output semantics that align with media QA workflows. Use cases span quick clip checks, automated playback tests, and instructional demos. The tool does not transcode or fetch external metadata, focusing on consistent playback behavior and timing verification.