Allow aspect ratio to control video stage height

Preserve native video aspect ratios in gallery cards

Match video player frames to source aspect ratios

Restore proven iframe video player

Use native player with retry handling

Stream generated videos through native media frames

Load embedded videos through same-origin blobs

Fix generated video playback

Refine scene labels and benchmark text

Add local SpaVoBench frame cache and responsive polish

Build public SpaVoBench gallery framework