I have no idea who makes this DVR. I looked all over and saw no mfg name / logo, just 'Xfinity'. Also the Ethernet jack is enabled as it needs an network connection (i.e. you can check your Facebook via this DVR if you wanted too).
I've been doing a little hunting for information and found this in a FAQ:
Q: Will I be able to record more than one program at a time with my DVR?
A: Yes, you may record more than one program at a time with your XFINITY TV Service. You can actually save up to two programs at the same time, and even watch a third program of any kind - a live program, a previously saved program, a on demand selection or Internet content while those recordings are in progress.
I found X1 User Guide in pdf format online too but I've been searching so many places for info I forget where I found it or I'd attach the link to both for you. Page 9 of the user guide says:
Record Multiple Programs
You can record up to two programs simultaneously and even watch a third program, whether it’s a pre
recorded show, a live program or an On Demand program.
To add...I can record two shows and watch a third LIVE show (couldn't do that before or ON-DEMAN with two shows recorded)/. But with all these features maybe an upgrade will all that. Looking inside the unit via the vent holes on top I see a cable-card in use.