In general, no. But if you were recording all of your shows to play back on a 4:3 "old-style" TV and you go to a 16:9 "wide-screen" TV, you may need to zoom in on some images to make them fill the screen.
It depends on the DVR company. I believe that Knowlegy and Midcontinent can hold 80 hours and I think Dish can hold over 200 hours. I'm not sure about the other ones. You could go to there sights to find out.
The Comcast DVR can hold about 400 hours of SD programming.
It has a stored memory,not on time just on space available.
The EverFocus ECOR4 4-CH DVR w/DVD BURNER does that.
Off of your DVR, if you have one.
Most TV providers provide DVR. I have Charter and I use their DVR service. I know that UVerse, Direct TV, and Comcast also offer DVR. It is great! I never miss my favorite shows now!
No, you will need the remote that goes with the tivo dvr.
The most popular and reliable brand of DVR recorders would be TiVo.
Usually as long as you have it stored on your DVR, and just like a VCR, you can watch it over and over again. I have some recordings that have been stored on my DVR for over two years, and they still play. Just be sure to `protect` your recording so that the DVR doesn't record over it if the drive is close to being full.
You can play a recorded show from one DVR but you cannot play it on another DVR. A DVR works similar to a computer that is not linked to any other computer or the internet. You may record something on a single DVR and the television it is linked to will save the show you want to watch at the particular time it plays. Then you will be able to go back at a later more convenient time and watch the show as you like. But if you two DVRS' in a house, one upstairs and the other downstairs, you can only play recorded shows on the DVR that you recorded the show on.
There are several companies that provide direct TV, with HD and DVR. DirectTVPlus HD DVR offers a service where you can record, watch, and delete shows in any room, with just one HD DVR.
There are lots of interesting shows that one can find from a DVR. One of my favorites is The Walking Dead which, as of November 2013, airs on AMC at 9pm on Sundays.