That was easy. You have a lot more in you.
Why the suicide grip? Also, in your set up, you notice you drive your hips up to get your shoulders set, then sit way down onto the bench which just pulls your body angle back down and pretty much takes your legs out of the lift too?
Try this. Get hands and shoulders sort of set, then pull feet way back underneath you and wide, as wide as you can stand and still get heels on the ground (you'll feel your glutes pinch, that's good), then drive hips up (they shouldn't come up much) and shoulders back and kind of wiggle feet back too (so hips are back on bench again if nec). So when you settle hips, or even better don't have to settle hips, you are good to go. CHest is much higher, feet are planted and legs pushing hard as you can.
That way your angle is as good as possible, your legs are in the mix pretty hard, and there's no way your butt can come off the bench if you choose to compete.
If you're comfortable benching, you're not using good form.