Sure that would be great if you can record it. But how are you able to press play on mobile Firefox. I hid the button on mobile. Are you accessing that using Firefox dev tools?

Btw, it's suppose to autoscroll on Play. That is the feature. Its what I call the 'storyteller mode'. I am thinking of using text-to-speech to read each event before proceeding to the next event so the 5 second delay is an arbitrary setting for now.

If you don't want the autoscroll, then you can just scroll the old fashion way on the sidebar. When you do the map will flyTo() the corresponding event.