Liproll jaw dropping, is it neccecery?

When i liproll and NOT drop my jaw it sounds somewhat of a liproll. But when i try to make the correct mouth move it sounds bad. So in the video i give two options witch one of them i should do?

https://youtube.com/shorts/X5Yaj7GTJsQ?si=jyPk0AYDfXJYUkm0