Web apps for video meetings will benefit by allowing picture-in-picture when
users switch back and forth between web apps and other applications or tabs.
This is currently not possible because a user gesture is required to enter
To support these use cases, a new autopictureinpicture attribute
is added to the list of content attributes for video elements. This feature
applies only to Progressive Web Apps users have installed on Desktop.
Note: In Chrome 73, it is available for trials so
that websites can use it without any experimental flag.