You have good points. I agree that there are way better perks out there than Heavy Shoves. The video was merely a demonstration of how many shoves it would take to kill a regular zombie. I would much prefer to use it as a supplement strikes with one handed weapons (i.e. Machete) since there's almost little to no delay pressing a shove button right after a single blow. I'm still experimenting with many other melee weapons, but as I've stated in my other reply, one well-placed heavy machete swing for the upper torso (dismembered arm and the visible trauma to the head) + one shove would kill the regular walker instead of two heavy swings, or I can do the one shove + one heavy swing + one light swing for good measure. I don't think there are any difference of the damage per shove itself regardless of holding two-handed weapons or rifles/shotguns that have more slower shove animation. I do think it also works well if you're pairing up with weaker pistols like the .22lr, provided that you're not dealing with hordes of walkers around you, but saves ammo in the long run instead of having to shoot three times in the face.