This addon used to not include a large QR code watermark on downloaded videos. Just recently, now it does. It was nice while it lasted. The developer would do better to add a less obnoxious watermark like Hypercam. Still present in the video, but it doesn't block a significant portion of the picture.

If there is a way to download the video and audio streams without muxing them together and add the giant watermark, I didn't find it. I didn't care to look for more than a minute. I'll find something else.