Fix a crash when there's only 1 tile and it gets shrunk

src/video-grid/NewVideoGrid.tsx

@@ -119,7 +119,7 @@ const findLastIndex = <T,>(
   array: T[],
   predicate: (item: T) => boolean
 ): number | null => {
-  for (let i = array.length - 1; i > 0; i--) {
+  for (let i = array.length - 1; i >= 0; i--) {
     if (predicate(array[i])) return i;
   }