examples: add E2S4_three_character_confrontation

.gitattributes

@@ -36,3 +36,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 examples/E1S1_garden_walk_single_character.mp4 filter=lfs diff=lfs merge=lfs -text
 examples/E1S2_prince_meets_dual_character.mp4 filter=lfs diff=lfs merge=lfs -text
 examples/E2S1_murong_plots_cross_scene.mp4 filter=lfs diff=lfs merge=lfs -text
+examples/E2S4_three_character_confrontation.mp4 filter=lfs diff=lfs merge=lfs -text

examples/E2S4_three_character_confrontation.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:52fde64b5ff5786709c1a90e74696a0c471e852552a815e2b3d20846e7d6d582
+size 1120813