MP4
MP4 / progressive
Native progressive playback with byte-range seeking.
Phase 1 · Core Player Engine
One player. Every modern streaming format.
The same dependency-light JavaScript engine handles progressive MP4 and WebM, adaptive HLS, and MPEG-DASH with accessible controls and mobile gestures.
Pure JavaScript
HLS.js
Shaka Player
Keyboard + touch
16:9 responsive
These demonstrations use public-domain remote streams. Playback requires internet access and a browser with Media Source Extensions.
HLS
HLS / adaptive
Adaptive HLS playback powered by HLS.js with native Safari fallback.
DASH
MPEG-DASH / adaptive
Adaptive DASH playback powered by Shaka Player.
Keyboard shortcuts
- Space / K
- Play or pause
- ← / →
- Seek backward or forward 5 seconds
- ↑ / ↓
- Raise or lower volume
- M
- Mute or unmute
- F
- Enter or exit fullscreen
- C
- Toggle captions
- P
- Toggle picture-in-picture
Manual verification checklist
- MP4 starts and seeks correctly
- HLS adapts and exposes available quality levels
- DASH adapts and exposes available quality levels
- Controls appear on pointer movement or keyboard focus
- Keyboard shortcuts work while the player is focused
- Double-tap left or right seeks ten seconds on touch screens
- Every player remains 16:9 at all viewport widths