You can also watch some HD Youtube movies instead of playing, you will see more, and its cheaper to.
Sometimes when gaming i also take a picture of the screen for inspiration.
Very true, all of the let's plays out there can be really useful from a research standpoint. Plus, not only is it cheaper, but it doesn't take near as much time. Let's face it, if you start playing a quality game, you are going to end up playing it a lot longer than you would watch a video on YT.