Editor's note: we offer our long-term sponsors the opportunity to write 'Sponsor Posts' and tell their story. These posts are clearly marked as written by sponsors, but we also want them to be useful and interesting to our readers. We hope you like the posts and we encourage you to support our sponsors by trying out their products. Remember what it was like to capture video off a computer screen before desktop recording software came along? You'd mount a big, expensive camera on a tripod, point it at the screen and, unless you had tweaked a bunch of settings or loaded special software, you'd get black bars creeping up and down the screen because of a refresh rate mismatch.