The zload CDN URL (remote_control.php) is a valid faststart progressive mp4 that
ExoPlayer plays fine when fresh: 206, no IP/referer binding, ~2h token TTL,
verified from a residential IP. Real-device failures (player_error/gone
telemetry) come from the static URL going stale: a rotated or dead CDN node, or
an expired token.
Instead of falling back to the tube page in a WebView (removed, it papered over
the real issue), PlayerScreen now re-resolves the scene fresh via the backend on
initial-load error for backend-native KVS tubes (watchporn). That yields a live
node plus a fresh token and stays on the native direct stream (0 VPS bandwidth).
For these origins a CDN 'gone' (404) means stale URL, not deleted, so we
re-resolve on gone too; a genuinely deleted post raises HosterDead (410) and
falls through to the normal fallback chain.
Also: add playback_events.error_detail (raw ExoPlayer message) to pin down the
exact failure of tubes we cannot reproduce on the emulator. Keep FLAG_SECURE on
release builds only (!__DEV__) so debug builds stay screenshottable for local UI
verification.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
