Google Chrome: Current or previous 5 versions,
Firefox: Current or previous 5 versions,
Safari (Mac devices only): Current or previous 5 versions,
Microsoft Edge: Current or previous 5 versions
If you have internal speakers, make sure they aren't muted.
If you have external speakers, make sure they are powered on and aren't muted.
Make sure you did not lose Internet connectivity.
Make sure your system has passed the system test located under "Test my system now".
If you are using a mobile device, such as an iPhone, make sure you have enough bandwidth. We advise using dedicated wi-fi or 4G.
If you are using an Android device, Apple iPad or iPhone you will need to click on the media play button to begin the presentation. Android and Apple iOS devices do not permit streams to begin automatically.