A "Let's Play" is a full play-through, not just a section. Since the story is split in two, it's sort of acceptable to not to both sides... at the same time.
I was going to attempt to do one of Eden, Hard, with commentary added during editing, because the game likes putting the pressure on you, so I have to focus on the game, not talk, but I don't have the proper tools, nor the voicing skills for it.