Help: How to connect many buttons on the bread board

Hello, everyone
I am trying to connect 10 or 12 input buttons on digital Arduino Uno pins (from pin 2 to pin 13) the "processing" program displays the pressed button id, i am using ( 10 K ohm from ground pin attached with every digital pin( could you please see how circuit looks like in the attached video)) , It seams that there is a problem with the power circuit, because when i move the (5v and gnd wires) to the left side on bread board the buttons on the left side pins activated, and when i move them to the right side the pins on the right side activated.

I did attach a video of the circuit and the output on the laptop screen.

I will highly appreciate your advises that could help me solve this problem

Thank you

i am using ( 10 K ohm from ground pin attached with every digital pin

Why use external pull-downs, when you've got built-in pull-ups?

I could not open the video as it is private. It may be, from your description, that the horizontal (power rails) are split in the middle and require a jumper to connect them. many breadboards are built that way.

Thank you for Advises, I did tried many things to solve, including external and the built in transistors but that did not solve the problem, AWOL.

BUT Now It works according to your Idea groundfungus :slight_smile: Thank you