Jaycen Joshua demonstrates how to enhance the impact and power of a kick drum by extending its sustain. While he doesn't specify the tool used, a transient shaping tool would achieve this result quickly and efficiently.
He explains that a longer sustain makes the kick sound bigger to the listener, even if the initial hit remains unchanged. This technique is particularly useful when increasing the attack or volume of the kick would negatively affect the mix.
By simply lengthening the kick's duration, you can achieve a more powerful sound without increasing volume, providing a practical solution for achieving a bigger kick in your mix.