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- Technical Specs: https://www.w3.org/TR/webvtt1/
- Metadata format can contain image, description, and its hyper link (href): https://www.w3.org/wiki/VTT_Concepts
- WebVTT Example in HTML 5 implemented by Ian Devlin: https://www.iandevlin.com/html5test/webvtt/html5-video-webvtt-sample.html
- Plugins supported: plyr.io, playr, Flowplayer, jwplayer, MediaElement.js, LeanBack Player, SublimeVideo, Video.js, Radiant Media Player. You can also have good information at https://videosws.praegnanz.de/ that shows HTML5 Video Player Comparison.