Lobster cc0 Model from Blendswap
Hi, I saw your videos on YouTube, you have plenty of short videos, it will be cool that you make some story and longer video! Lobsters are very funny 
Well first off, the front two legs are up against his head, like an “on no!!!” sort of expression. Which isn’t the best for balance. I’m not sure what you were doing with the claws…also, when he walks, he sort of jerks forward every few steps, almost like a chicken or something bobbing its head. Hope this helps.