fix

app/Http/Controllers/MediaController.php

@@ -339,17 +339,17 @@ public function filters(Request $request)
     }
     $caseSql .= "WHEN duration > {$this->durationOtherMin()} THEN '120-' END";
 
-    $durations = Media::select(
+    $durations = DB::table('media')
+        ->select(
             DB::raw("{$caseSql} as duration_range"),
             DB::raw('COUNT(*) as total')
         )
-        ->whereNotNull('duration')
+        ->where('duration', '>', 0) // every positive duration falls into a bucket
         ->where(function ($q) {
             $q->where('visibility', 'public')
               ->orWhere('user_id', auth()->id());
         })
         ->groupBy('duration_range')
-        ->havingRaw('duration_range IS NOT NULL')
         ->get();
 
     return response()->json([