Nice video; I couldn't agree more.
Reusing an older system is also a great way to learn about hardware.
The Icy Dock tray-less SATA drive bays are excellent for swapping out drives.
I have a couple those that work very well, especially now that SATA cabling makes it so much easier.
I used to do something similar " back in the day" with KingWin IDE removeable trays.
Regardless of how old a spare system may be, one has nothing to lose by trying a livecd.
It's also surprising (perhaps not), that with a little research one can find a pci wireless card/antenna or usb wireless device that works with PCLinuxOS.
However, I would caution folks from throwing too money into older systems; especially IDE systems. It's good if one has an abundance of spare parts.