Taking the Motion Tests

Hi! I'm Iñaki and I'm just getting started with this whole journey. I've played guitar for many years, and I've always struggled with alternate picking speed. I feel it's what's held me back the most. Many times I had doubted whether I could be physically incapable of playing fast alternate picking, but through taking these tests I've confirmed that I am not, and have a lot of room to grow. Just wanted to upload these videos so as to know if there might be any things that I could be doing wrong in some of these motions. I would really appreciate any feedback! Thank you! Send you a big hug from Argentina!