Hi Nicole,
Background videos in immersive sections work best when they set the mood or provide an ambient experience. For example, this story from the Fish and Wildlife Service (the one shown in the screenshot above) uses background video with ambient sound very effectively.
If you have a video with speech or narration, it’s recommended you use it in a narrative section or panel. This is especially true if the speech begins immediately at the start of the video. Videos in narrative sections require readers to click to begin playback, which ensures they won’t miss anything important at the beginning of the video. For example, this story about commuting in Washington DC features video testimonials in narrative sections.
Thank you,
Aravind
