Progressive experience
Poster and bounded fallback before heavy content.
Performance
Protect intent across devices and scene sizes.
Progressive loading, visibility scheduling and adaptive quality keep the viewer responsive without silently changing user intent.
Adaptive profile
Performance conditions choose the safe effective quality.
Responsive interaction
Desktop and mobile keep the same core controls.
Truthful boundary
Evidence before assumption.
Paid entitlements set a maximum visual tier; they do not override the safety governor.