Mix up your training with some short explosive bursts it's awesome!
To increase power, adding even a few minutes of plyometric training to your usual routine can add more kilograms to your squat and gain more efficient neural drive to the glutes, so building more power and strength in the legs.
Increased rate of "force development" and neural drive means getting your muscles to contract & expand efficiently.
This is is key to good power, you can't just rock up & expect to do a one rep max if you're not doing the correct drills
In the video it's just 10kg resting on my shoulders, opening up the hips & driving with the glutes to hop into position is testing & will improve your balance, flexibility & increase power to your backside.
Start off with no weights & try 3-5 sets of 8-12 repetitions, then as you get better balance & more confidant, put on some weight & drop the repetitions.
If you want to really increase your power, put on a heavier weight and only do 2-5 reps for 5 sets, maximum 3 min rest between sets, (polite suggestion ) bring your "A game" or end up face first on the gym floor!.
(I can now do 42.5kg for 5 reps & 5 sets with 2min rest between sets)