The best way to record in-gane gameplay?

[Callos]

My personal favorite out of them all would have to be Dxtory. It compresses files and gives a option for the quality of the video. Unlike fraps it also gives you the ability to use which codec you want which will also save you on space. This is what very few people recommend but that's because not a lot of people know it's out there.

That's what I use. Nothing else to say really.