Animation: How does walking cycle work?

So, after rigging the model we got to the animation. i used this as a material:

SouthernShotty – Walk Cycles in Blender for Lazy People – The Easy Method.

Recap: First we align metarig(skeleton) to inside of our model (this is WIP).

When skeleton is aligned with mode,we generate (real) rig:

after we pair rig to our model we can move rig and model bends to our will:

So we move limbs, save their position and rotation in timeframe, and move to next timeframe.
After few hours of tinkering got this:

Next: We import model and animation to game 🙂