У вашего броузера проблема в совместимости с HTML5
This video covers the method to install Amarok – 2.9.0 on Ubuntu – 18.04. Amarok is a free, open-source and cross-platform music player.
For more explanation on this video: https://www.linuxhelp.com/how-to-install-amarok-2-9-0-on-ubuntu-18-04/