Please check 1:33.
Many people said that all the electrons are just shifted at the same time when a current flows in the wire. So electricity can move with the speed of light.
If I have $3\times 10^8m$ wire and force a current at one end of that wire, it will take $1s$ for electricity to flow. In case of $6\times 10^8m$ wire, it will take $2s$. Why does it take more time in case of the longer wire? If actual electrons don't need to flow to the other end of the wire, why is the velocity of electricity limited to velocity of light?