dark_jedi said:
which would crush the snow speeder even MORE when the weight of the AT-AT shifted onto that foot when the others start to move.

Now that is EXACTLY how I feel,whether it is putting "all" its weight on it or not,it is going to flatten,and in my opinion,it is putting all its weight on it,it is walking forward isn't it?

If the scene were to continue on, it would get more crushed as it started walking again, but it's pretty stationary at the time we see. It comes down and stays there motionless for a second or two. (it would be funny if it started rotating right and left, like it's squishing a bug) That leg would be slightly bent and the rest would be more or less straight.