diff --git a/lib/Tools/Helper.php b/lib/Tools/Helper.php
index 20f3ef1..5d68b41 100644
--- a/lib/Tools/Helper.php
+++ b/lib/Tools/Helper.php
@@ -202,11 +202,9 @@ class Helper
         $dataPath = \OC::$server->getSystemConfig()->getValue('datadirectory');
         $paths = ['/usr/local/sbin', '/usr/local/bin', '/usr/sbin', '/usr/bin', '/sbin', '/bin', '/opt/bin', $dataPath . "/bin"];
         $result = null;
-        if (self::is_function_enabled('exec')) {
-            $exeSniffer = new ExecutableFinder();
-            // Returns null if nothing is found
-            $result = $exeSniffer->find($program, null, $paths);
-        }
+        $exeSniffer = new ExecutableFinder();
+        // Returns null if nothing is found
+        $result = $exeSniffer->find($program, null, $paths);
         // store the value for 5 minutes
         $memcache->set($program, $result, 300);
         return $result;
diff --git a/lib/Tools/Youtube.php b/lib/Tools/Youtube.php
index ef358e3..b0270f1 100644
--- a/lib/Tools/Youtube.php
+++ b/lib/Tools/Youtube.php
@@ -66,7 +66,7 @@ class Youtube
 
     public function setAudioQuality($value = 0)
     {
-        $this->addOption('--audio-quality', $value);
+        $this->setOption('--audio-quality', $value);
     }
 
     public function GetUrlOnly()