cdnjs is a free distributed JS library delivery service.
Ibexa DXP is an open-source enterprise PHP content management system (CMS) and Digital Experience Platform (DXP) developed by the company Ibexa (known previously as eZ Systems).
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
PHP is a general-purpose scripting language used for web development.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.