Issue: Both videos don't always load when using Safari to play dual-video Mediasite content. Sometimes both load, but other times only one or the other will load. You may experience inconsistent behavior when refreshing the page.
Work-around: Safari now has Auto-Play settings that can impact Mediasite playback. To change this behavior navigate to Safari > "Settings for This Website..." Click to the right of Auto-Play, and select "Allow All Auto-Play." For more information on the Auto-Play settings see the following Safari article: Stop autoplay videos