I've the same pump, it's loud but great. It has two air outlets, the one you use in this video and a second one. For b2p it's best to close the unused outlet (e.g. using duct tape), then it builds ups much more pressure .... you'll love, how the balloons go BOOOOOOOOM this way ;)
LITTLE Ps ASMR & Balloon pop i know - just like to watch how you smile and laugh after the pop ;) Have fun and enjoy life as much as possible! Wish you a great weekend!