Conveyor Belt - Factory Arm Animation - Blender 2.81 Eevee

I&rigged robot arm hardly, watched a few tutorial videos. Robot arm moving so fast, sorry for that. I&tried use child of constraint, Dynamic Parent addon but Its not working with rigid body system. I&deleted all and moved boxes frame by frame. I&used auto key. Conveyor belt, its tires and red light modeled by me. I&rookie about modeling. Just modeling simple things. Fragile Boxes model from Sketchfab hishamhamid user Arm Machine model from Sketchfab MelsinAoW Conveyor Belt tutorial from Youtube Majestic Skies and shahabCG users Conveyor Belt Machine Sound Effect from Youtube SFXsource user Factory ambient sound effect from Youtube TheMSsoundeffects user