Groesten Haus Weapons Upgrades for CoD WWII Nazi Zombies

I made this video because I can't seem to get people to help in the upgrading of weapons. Sure, after I, more often than not, unlock the 'Pack-A-Punch' Mystery Box, they're happy to grab the weapons, but usually they aren't stepping up when I ask if they have a jack in the box, or if they can play the piano. Hopefully, this will show how easy it is.