DVR 722K. So far only OTA but that my be because that is the source I record from most. Say there is a 1 hour show,It will say 1:05 as the recorded time. As you view the recording. it works till say 30:00 min., left could be less could be more. Then recording just ends. Says a full hour but no content. Software 750. Wondering if its software or HD? Or something else?