Please keep this as an _option_.
The current lack of having background video streaming prevents me from using my old androids as dashboard AND a network camera, even though they have the capacity to be both.
On the subject, I would really prefer this to be an option as well, even with the default being not the current default, however I see that there is a general trend of removing a lot of fine tuning knobs in apps (android or otherwise) in the sake of reducing complexity for the end-user.