What is the Gunnebo H.264 DVR? The Gunnebo H.264 DVR is an H.264 digital video recording system used to record, store, and playback surveillance videos efficiently. It works on the H.264 standard for video compression, which is well known to provide good video quality at smaller file sizes. This results in more recorded footage in less disk space—saving costs and making it easier to store footage in the long term.