I've used this app many times to create training videos for my team's software, to capture a video that doesn't have an easy save feature, and so much more.
Here's a useful tip: it's possible to redact portions of the video by doing the following: make a mostly transparent PNG the same dimensions as your video, but with black shapes where the video has content you don't want in the final video. Then, before exporting, choose that PNG file as the "Emblem" (see the Movie Info tab of the Export interface), and make its Position: Center. The way I did this was to take a screenshot of the first video I exported, then open that screenshot in Preview.app, then use Preview's annotation features to add a couple black rectangles, then clicked in the screenshot's background, Select All, and delete. The only thing still there were the black rectangles. I saved the screenshot (it was a PNG), and then used that as the Emblem, did a fresh Export, and voila! A redacted screen-recording video.