Load Youtube Video Only When Needed – Youtube LazyLoad
Yet another Youtube lazy loader that delays the loading of Youtube video player to improve the performance of your web page.
JavaScript & CSS youtube
Only Load Youtube Video Player After Clicking The Thumbnail – LazyTube
LazyTube is an ultra-light Youtube video lazy load library which only loads/displays video thumbnails on the page and fetches the Youtube video player only when the thumbnail is clicked.
Generate Interactive Chapters For Youtube Videos – youtube-chapters
youtube-chapters is a vanilla JavaScript plugin to generate interactive chapters for long Youtube videos. So that the visitors are able to quickly jump between multiple segments of your video by clicking the chapter links.
Responsive Youtube/Vimeo Video Lightbox With Vanilla JavaScript – MediaBox
MediaBox is an easy and lightweight vanilla JavaScript library which displays and plays Youtube or Vimeo videos in a fullscreen, responsive, modal-like lightbox popup.