Increase the default limit

yt/subscribe.pl

@@ -21,7 +21,7 @@ my $EXCLUDES_FILE   = 'exclude_videos.ini';
 my $CURL_BIN        = 'curl';
 my @CURL_ARGS       = ('-4', '--insecure', '-C', '-', '--connect-timeout', '10', '--max-time', '600');
 my $BATCH_SIZE      = 50;
-my $MAX_INDEX       = 2500;
+my $MAX_INDEX       = 5000;
 my $DRIFT_TOLERANCE = 2;
 my $DRIFT_FACTOR    = 100.0;
 my $API_URL         = 'https://gdata.youtube.com/feeds/api/';