The music is Popcorn from Persona Q2.
The mod used for dps display is the DPS Overlay at mod nexus.
I can't share the mod for shelling damage change because I was asked to not share it. Credit goes to the Monster Hunter World Modding Discord.
First video I'm working on to find out the best options for gunlance.
I will not focus on empty worth theorical number crunching at all but focusing in testing demostrate that it work on a practical sense.