Works for me on Firefox 60.9.0esr. No sound though.
Thanks for reporting! What's your browser? I've only tested with a recent Firefox and Chrome on Windows. I know iOS doesn't work but I don't have a means to debug it.
Same here with Safari 12.1.2 on MacOS 10.14.6, just FYI.
Same here, iOS 12.4.1 Safari
I’m using Safari on iOS 13.2. I can help debug I’d you’d like, but I’m no expert ;)
Otter Browser provides an up-to-date Webkit (i.e. not Blink/Chromium) engine on Windows, that replicated a lot of Safari-only bugs for me in the past.