Having looked through all the documentation, I found a method that allows me to get the angle of view VrWidgetView docs
getHeadRotation(float[] yawAndPitch)
I need then to save it and apply at the next launch of video. Any way that it can be set programatically? Thanks in advance.
Update: Actually that method returns void. And I can't even see any difference when using it with different yaw and pitch values. So I need to know how to both get and set the rotation values.
Update 2: it is hilarious but only now I found out that the values are actually written to parameter instead of returning them. So I can get them, but don't see how I can apply them.
Not sure this can be considered a full answer, in case I can move it to a comment.
According to this Google VR issue such component will not be extended to give this type of complex features.
Google official suggestion is to look at the Video360 Sample as a starting point, and get your hand dirty.