Exibir código-fonte para Tocador de vídeo

* https://support.google.com/youtube/answer/6375112?co=GENIE.Platform%3DDesktop&hl=en
* https://github.com/video-dev/hls.js/blob/fb78755242f1511870022c810fb96076e46ad7ec/docs/API.md
* https://support.streamroot.io/hc/en-us/articles/360000913654-Clappr
* https://docs.peer5.com/players/clappr/
* http://jsfiddle.net/amashoshin/a9cgx7sn/
* https://cloudinary.com/blog/html5_video_player
* https://github.com/clappr/clappr/issues/402
* https://pastebin.com/WLNXsPzu
* https://videojs.com/plugins/
* https://en.wikipedia.org/wiki/HTTP_Live_Streaming