Google has made changes to how Chrome handles videos that autoplay. This means that while videos are allowed to autoplay, they do so without sound. The viewer must make a "meaningful interaction" with the player to enable sound. Typically, this would mean "pause-then-play" to start the audio. See: https://developers.google.com/web/updates/2017/09/autoplay-policy-changes

This means there are several browser-specific behaviors:

• • Safari iOS / MacOS: never autoplays.
  • Chrome Android: never autoplays.
  • Chrome Win / MacOS: autoplays without sound until interaction.
  • Firefox Win / MacOS: autoplays with sound (for now...)

So, we took a view that the easiest workaround for now is to always require "click-to-play", since there is no programmatic way to avoid this issue in Chrome.

Therefore: for all video states, the user must now click play to start the video (and audio).