Caro Emerald : Intro
Unfortunately your browser (Safari, Internet Explorer, Edge ?!) does not support the open ogg audio- and the webm video format. Apple and Microsoft "don't like" open and controllable systems (at themselves, they do at you(rs) ...) and have choosen to still not support open source formats. Where they already for more then 10 years state to be willing to use them ... That's why they are discontinued here.