overlay: separate <video> over the content player; all break formats.
shared-element: ad plays through the content <video> so iOS native fullscreen is kept.
Single fullscreen ads only; advanced formats are downgraded, lshape_content is skipped.
adaptive: iPhone/iPod on iOS 17.1+ (Managed Media Source): overlay while inline,
shared-element while in OS-native fullscreen (DOM overlays cannot render there).
auto: iPhone/iPod → adaptive when MMS is available, else shared-element; otherwise overlay.
Ad insertion strategy (compositing).
overlay: separate<video>over the content player; all break formats.shared-element: ad plays through the content<video>so iOS native fullscreen is kept. Single fullscreen ads only; advanced formats are downgraded,lshape_contentis skipped.adaptive: iPhone/iPod on iOS 17.1+ (Managed Media Source):overlaywhile inline,shared-elementwhile in OS-native fullscreen (DOM overlays cannot render there).auto: iPhone/iPod →adaptivewhen MMS is available, elseshared-element; otherwiseoverlay.