cdnjs is a free distributed JS library delivery service.
Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
HTML5 Media enables video and audio tags in all major browsers.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.