We're continuing our discussions of animations by moving to skeletal animations now, which is how humans and such are animated, with different bones moving around.
Step 1: Go to Mixamo and download a character. Then download some animations for it.
Step 2: Import them all into UE4, first the character then the animations.
Step 3: Set the mesh of your character to the skeletal mesh from the character download.
Step 4: If you want to test it or don't need anything more, you can set the animation mode of the mesh to an animation asset, and pick one of the animations. It will do that animation over and over.
Step 5: If you want something better, create a blendspace and an animation blueprint, and set the blueprint as the animation mode for the mesh.
Step 6: Set up the blendspace and animation blueprint as shown in the video.