Social engine is a php commercial dating script.

UPDATE

Download html5-videochat plugin from this link

Edit application\modules\chat5html\controllers\indexController.php
And edit this

Upload the files to your site with FTP Both folders: (modules and packages)
Go to your social Engine admin panel and go to menu
manage->Packages & plugins and enable html5-videochat plugin

Congratulations:
Your chat is not available at url : https://yoursite.com/html5-videochat