You can manage your Brainly.com account notifications in your Account Settings. From there you'll see the Notificatins tab on the left of your screen and can click on that to select the ones you wish to receive updates on.
Or:
Go to settings of your phone, select notifications and go to the apps which use notifications and turn off brainly. Go to notifications in the settings of brainly app and turn off the notifications.
It would be different because you would need a lot more props to film. It would be more difficult in my option because you would end up spending a lot more money on props to make it look like there was no gravity.
