Add VG mini first-frame inputs: ElasticCouple_CartMove__bg253__c7hBO1_trajectory

.gitattributes

@@ -29030,3 +29030,5 @@ Leaderboard/Video[[:space:]]Generation/DoublePhysics/CatapultLaunch_StickSupport
 Leaderboard/Video[[:space:]]Generation/DoublePhysics/CatapultLaunch_StickSupportFail__bg204__bOZTzI_trajectory/CineCamera_Moving/rgb/0000.jpg filter=lfs diff=lfs merge=lfs -text
 Leaderboard/Video[[:space:]]Generation/DoublePhysics/DynMirrorRedirect_MirrorReflect__bg264__hOJnsl_trajectory/CineCamera_8/rgb/0000.jpg filter=lfs diff=lfs merge=lfs -text
 Leaderboard/Video[[:space:]]Generation/DoublePhysics/DynMirrorRedirect_MirrorReflect__bg264__hOJnsl_trajectory/CineCamera_Moving/rgb/0000.jpg filter=lfs diff=lfs merge=lfs -text
+Leaderboard/Video[[:space:]]Generation/DoublePhysics/ElasticCouple_CartMove__bg253__c7hBO1_trajectory/CineCamera_0/rgb/0000.jpg filter=lfs diff=lfs merge=lfs -text
+Leaderboard/Video[[:space:]]Generation/DoublePhysics/ElasticCouple_CartMove__bg253__c7hBO1_trajectory/CineCamera_Moving/rgb/0000.jpg filter=lfs diff=lfs merge=lfs -text

Leaderboard/Video Generation/DoublePhysics/ElasticCouple_CartMove__bg253__c7hBO1_trajectory/caption.txt

@@ -0,0 +1 @@
+Two laser emitters project coherent beams from the upper surface of a light-colored matte enclosure. Incident rays impinge upon four planar mirrors distributed across the surface, undergoing specular reflection consistent with optical principles. Simultaneously, a concave mirror intercepts the alternate beam, converging the light at the curvature’s focal point prior to trajectory redirection. Photons reflect between the interfaces, illustrating the law of reflection such that the angle of incidence equals the angle of reflection. The concave geometry focuses the energy, whereas the planar surfaces sustain beam divergence. The radiation propagates along the defined optical pathway without subsequent interaction.