I’ve been rooting around the engine trying to figure out how the animations work, and I can’t seem to figure it out. Are the default animations in the various examples (such as thirdperson) done in the engine or imported from a 3d application? And if so could someone point me in the right direction for some documentation on how to do that or set that up? Right now all i want to do is set up a sword swing, if I can learn that I can go from there. Any and all help is appreciated!
i think this tutorial my help you
?v=qF-SPPNPehA&list=UUhBUsM1iIL2v2Mmx-MgA2bA
in the third part he explain how to import the animation into the Unreal Engine 4
They were made in a 3d program -> on youtube you can find many rigging and animating tutorials 
That’s what I needed to know! Thanks Guys!