Only trim file name if folder name is shorter

Emby.Naming/Video/VideoListResolver.cs

@@ -226,8 +226,11 @@ namespace Emby.Naming.Video
                 {
                     testFilename = cleanName.ToString();
                 }
+                else if (folderName.Length <= testFilename.Length)
+                {
+                    testFilename = testFilename.Substring(folderName.Length).Trim();
+                }
 
-                testFilename = testFilename.Substring(folderName.Length).Trim();
                 return string.IsNullOrEmpty(testFilename)
                    || testFilename[0].Equals('-')
                    || testFilename[0].Equals('_')