Can i change default ROBLOX animation at this time?

Hi i want in my game for first custom jump animation playing on npcs work but on player i tryied all tutorial and no one works please help animation id for jump I want is:651948323 ON npc using

script.Parent.Parent.Button1.Button2.ClickDetector.MouseClick:connect(function(playerWhoClicked)
local animation = Instance.new("Animation")
animation.AnimationId = "http://www.roblox.com/Asset?ID=651948323" -- your id here

local animTrack =script.Parent.Parent:FindFirstChild("Humanoid"):LoadAnimation(animation) -- change Humanoid to the target's Humanoid

animTrack:Play()

end)