Owen Evans writes
This post describes a change to how videos with sound work in Cascade story maps.
Web browsers have been implementing stricter policies on autoplaying videos with sound. In April 2018, Google’s Chrome browser updated its autoplay policy to block videos with sound from autoplaying (for additional technical info see this article on the Google Developers site). Apple’s Safari browser had already implemented a similar policy, and other browsers are likely to implement similar policies in the near future.
Read the blog post...