I recently had a new Lenovo ThinkPad T440p come in for a client and I needed to add an additional 4GB of RAM. I didn’t take any video or even photos of the process, but it was super simple.
Simply flip over the laptop so you’re looking at the bottom. Remove the 2 screws from the upper right and left. Once removed, just slide the entire bottom towards you. You will see a lot of easy to access parts of the laptop. Use the same process to access the hard drive as well.