Do What You Can With What You Got
One of the harder movement patterns to hit is the hinge/deadlift, even harder so is to then develop the hamstrings, glutes and lower back when you have very little weight to use.
Traditional choices like good mornings, bent over rows, stiff leg deadlifts, deadlifts and RDLs all feel a bit pointless if we can't load them up.
However, there are some things you can do, if you have some weight like Coach Leah is demoing these movements with you can still get a good training stimulus.
Give these movements a try, manipulate your tempo so you're making the eccentric/lowering phase longer and pausing at the bottom to make them more effective.
At the least you will maintain your strength and for some of you, this will actually put some strength and size on your backside as these exercises will be unlike your normal deadlift training!