There actually is another way that is more work but has additional benefits.
The first thing is to get you and your parents on a common shared LAN. You can do this by
running a fiber optic cable from your house to theirs. This may initially be a bit more expensive than RG-11, but not that much more once you figure in all the costs, including the costs of lightning/ground loop protection. You can use this to share Internet or just to send video, that is up to you. If you only use it for video then only the
Then you set up some kind of home theater PC for your parents, preferably running
Kodi/XBMC. This could be something as simple as a Raspberry Pi running RaspBMC or XBian or a similar program, but you are likely going to want something capable of handling higher bitrate streams, and the Raspberry Pi just doesn't quite cut it. By the way, I do NOT personally recommend OpenELEC unless you have no Linux experience at all, because the inability to do common Linux tasks will frustrate you to no end. Something like a
CuBox-i might work but I can't say for sure. If they will be trying to watch any high bitrate feeds then something even more hefty in the video processing department might be needed. I really haven't fully researched the newer devices so can't say much more about it.
And then you need a backend system, and for that you can either use something like a
TBS MOI+ with an attached SATA drive, using the included
TVHeadEnd software, or you can build your own backend. If you go that route I'd suggest running Debian or Ubuntu, and a
TBS tuner card, unless you are a true Linux guru, in which case there are many more options open to you - not necessarily better ones, just additional ones. And use the latest TVHeadEnd unstable release for the backend software - unfortunately the latest stable version is rather dated and apparently does not contain support for certain aspects of DVB-S/S2 reception. Whether you buy something like a MOI+ or build your own, the MOI+ article I linked to gives some installation tips for TVHeadEnd that may prove useful. If you do build your own backend and use a TBS card, you will have to install the TBS drivers which does involve a compilation step, but the
instructions are pretty clear.
Then you put the backend inside your home, and run your coax from your satellite LNB to the tuner card. Then you use XBMC to watch the signal live, or schedule recordings (you can also schedule recordings via the TVHeadEnd web-based interface) which can be watched later. If you and your parents want to watch the same show, just agree that neither of you will delete it until you know the other has watched it. The obvious advantage is that both you and your parents can watch the live or recorded programs from any room in your home where you have a computer, which could be a home theater PC connected to a HDTV set, as mentioned above. It's just a much more flexible solution.
Plus, you avoid the very real issue of running copper between homes that may be at different ground potentials. If you decide to go that route, please use a very good lightning protector at each end; the article I linked to on running fiber explains why, and one of the comments in that article expands on it a bit more. And on that fiber run you can connect to gigabit Ethernet at both ends and use the full speed of the connection, and unless you physically damage the fiber or one of the fiber converters fails, it will probably work well past the point where the technology is obsolete. And once the satellite signal hits the tuner in your home, there will be no additional degradation of signal between your home and your parents' home.
There also the option to use a tuner card with multiple inputs, and/or LNBs with dual outputs, if you think you and your parents might want to watch different transponders off the same satellite at the same time.
It does take more effort at the beginning to do it this way, but if you and your parents both get addicted to free-to-air satellite TV, you will be really glad you made the effort!
P.S. As a bonus, if either of you has a decent TV antenna that picks up OTA channels, you can probably add them into the mix by adding a
HDHomeRun Dual to the network that the TVHeadEnd backend is connected to - I say "probably" because I am not 100% sure it can be done, although if not, there is doubtless some other ATSC tuner that will work. But, a HDHomeRun device could be at either house, since it will send the signals over the network to the backend. If you have the better antenna, then you have the option to use any TVHeadEnd-compatible HDTV tuner card in your computer.