I commented out 

line 88 in modules/boonex/videos/classes/BxVideosConfig.php 

and line 112 in modules/boonex/videos/classes/BxVideosModule.php

and it only encoded mp4 like I wanted, but when I clicked on the video in chrome, there was a 500 error, so I uncommented the lines and it works fine. How do I prevent a 500 error without those lines? Am I doing this the right way?