I can’t see any images but I do hear sound on your video. Maybe a problem on my phone. I’m guessing it’s your table that’s vibrating?
Many Altmill owners have stiffened the legs using a variety of methods: bracing, cabinets, shelves, etc. I made leg stiffeners on three sides (left, right, rear). I was going to do the front, but with the 3 stiffeners on the legs and the Baltic birch table, I figured it would be stiff enough. I may make one for the front eventually.