In order to effectively manage YouPHPTube, it is necessary to get feedback about the activity and performance of the server as well as any problems that may be occurring.

YouPHPTube stores error and activities logs in /your/path/to/YouPHPTube/video/youphptube.log

To monitor the responses and activities of the YouPHPTube service I use the following command: tail -n 200 -f /var/www/YouPHPTube/videos/youphptube.log

Sometimes it is also necessary to check the logs of your operating system, such as apache error, apache log, mail log, etc.

Also you can try to find errors on JavaScript or Ajax Request https://github.com/DanielnetoDotCom/YouPHPTube/wiki/Check-Ajax-answer