Well, it seems the provided context is about as helpful for taking apart a sofa as a chocolate teapot. The links are just YouTube's legal information, which won't help unless you plan to sue your furniture for being too big. So, let's toss that aside and get down to business.
Fear not, for most reclining sofas are designed with the forethought that you'll one day have to wrestle them through a doorway. The key to victory almost always lies in removing the backrests from the base.
Start by going around to the back of the sofa. In the gap where the backrest meets the seat, you'll likely find a flap of fabric. Feel around underneath that flap on the outer edges of each reclining section. You're searching for a small metal lever or a plastic tab on the mechanism. This is the secret release latch. Sometimes you can move it with your fingers, but a flathead screwdriver can be a helpful tool for gentle persuasion.
Once you find and release the latch on both sides of a single backrest, it should slide straight up and off its metal posts. It's often easier with a friend to lift it evenly. If you have a model with a center console, it may also lift off in a similar way or be held in place by a few bolts you can access from underneath. And please, if your recliner is powered, unplug everything before you start your disassembly adventure.
With the backs removed, the base becomes a much less intimidating beast to move. You'll look like a furniture-wrangling genius, ready to reassemble your throne in its new home.
