Most DVD's have two (or more) outputs. One is the RF output connected to the TV's antenna and you can then usually select the output channel (generally, channel 3 or 4), or it has a set of audio/video outputs (red/white/yellow jacks - red-right audio, white-left audio, yellow-video signal) in which case, you have to connect to the corresponding jacks on your TV, and then select the tuner/video in with your remote control, or possibly a HDMI cable (digital signal cable) by which you also need to use the TV's remote to select between tuner or video input.
If you're not getting anything at all, no sound, no picture, something's not connected correctly, you've not selected the proper input or are tuning in the wrong channel. Otherwise, you have a problem with the TV. (If it's a newer HD television, it's not unusual for the auxiliary input board to go bad).
You just might have a selector switch which determines which output the DVR/DVD player has. It could be on the remote control or possibly, a button on the unit.
Any DVD/VCR combo with a composite out will work great with your TWC DVR.
You can connect the output of your DVR in a DVD recorder, such as the Samsung DVD-VR375. This will record your DVR programs directly to DVD.
If your DVR has a built in DVD player, yes.
The Toshiba SD H400 - DVD player / DVR is a good one.
There are several DVD recorders that come with DVR capability
If you have an external DVD component recorder and a Comcast DVR, just plug the output from the DVR into the input of the recorder. Then you can record your "My Recordings". Start the DVD recorder, then start the saved event. But you will have to leave it unattended, start it when you are not going to watch for the length of the saved event. If you want to record live, it should work the same, but I have not tried it. Just remember that the DVD recorder will record whatever is playing on the screen, so if you change channels or watch a different recording it will record whatever is playing.
Yes, you can find dvd/dvr combos at most major electronics stores.
DVD and Blu-ray
Yes the EverFocus ECOR4 4-CH DVR w/DVD BURNER will also play your DVd videos.
This depends on the particular model. Some DVRs have DVD players built in, and some do not. By itself, a standalone DVR (Digital Video Recorder) without a DVD drive built in cannot play a DVD.
The EverFocus ECOR4 4-CH DVR w/DVD BURNER does that.