- Observe the video element itself instead of el.closest('.episode-tile'):
ref callbacks can fire before ancestors are attached, so no tile was
ever observed and the visibility allowlist blocked all playback.
- Use a blocklist for off-screen culling (play until reported off-screen)
so observer lag/failure degrades to the old always-on behavior.
- Default to the first season playing on page view again.
- Keep preload="auto" so tiles show a first-frame preview picture;
playback gating already prevents GPU use from inactive videos.
- Stop videos staggered (same 500ms step as startup) on idle stop,
season switch and scroll culling; same for movie page showreels.
LeoVasanko
e5bc736ffa