Fastly is a cloud computing services provider. Fastly's cloud platform provides a content delivery network, Internet security services, load balancing, and video & streaming services.
GitHub Pages is a static site hosting service.
The lite-youtube-embed technique renders the YouTube video inside the IFRAME tag only when the play button in clicked thus improving the core web vitals score of your website.
Varnish is a reverse caching proxy.
Vue.js is an open-source model–view–viewmodel JavaScript framework for building user interfaces and single-page applications.