Today I'll be showing you an original piston enchantment room with 3 simple levers for low, med, and high level enchants. I'll try to work on making the design less bulky soon, but for now, how this is helpful to you all.
If you have seen someone with the same/similar design, I want you to know that I made this with no help, tutorials, etc.
You can power all the pistons in a more resource efficient manner.
Either replace all the repeaters on the bottom with dust - they are already powered by the top dust just need a block update. This would be the most resource efficient method. You could also replace the bottom row of dust with anything that makes a block update, but most of the cheap options make a noise (fence gate and trapdoor). Powered rail and Lamps are the best silent block updater, but also usually not worth the resource cost in survival.
Torches would also be an option and roughly equal to two lines of dust in resource efficiency.
The other option is to raise the repeaters up one level and they will power the top and bottom pistons directly saving a run of dust, but using relatively inefficient repeaters.
What's up with the crappy camera? To be honest, a got a headache from watching the video. Are you using a video camera to record it or something? As for the actual design- Peppe is correct, as is hash.