This in the course is a part i could not follow along Since my rod for the lamp is one piece i had to use another technique to apply the armature to my model. I hope i can follow along.
I used the “Armature Deform Parent” feature with Envelope Weights to be able to create this one continues tube without having it break when rotating one bone.
https://docs.blender.org/manual/en/latest/animation/armatures/skinning/parenting.html
Look at the bones! its going to be a lot of work to animate i am afraid