I got a few H.265 files last week and I spent a good part of the week looking at the best way to play them back on TV.
What I found is that hardware support is only available on SOCs which integrate a H.265 (HEVC) module and these are only found on 4K (UHD) players. I did not find a single HD media player which supports H.265. They all support H.264, but not H.265.
Software playback is troublesome. While looking around, I found many examples of players which "support" H.265 but forum posts all say the playback is jittered and not working well. Kodi and distributions based on Kodi such as OpenElec and LibreElec may work but I would not expect them to deliver near the throughput offered by hardware decoding and certainly not on the chips used in HD Sat receivers. To give you an idea of your box' throughput, run > openssl speed aes-128-cbc ... my DM8000, delivers 4 times less performance than my BCM5300 router, 20 times less than my Dual-core Celeron NAS and nearly 40 times less than my 6-year old i7 Mac.
Here are some examples:
* H.265 Players with hardware support: Dune HD 4K Solo with Sigma SMP8758 chip, Popcorn Hour VTEN, A-500 and A-500 Pro all with SMP8758 chip as well, Odroid C2 with S905 chip
* H.265 Players with software support: Zappiti 4K series and quite a few other Android-based players with Realtek RTD1195 SOC which supports UHD output and HEVC decoding but only on HD, not on UHD. You need the RTD1295 chip for UHD HEVC hardware support and only a few players use that chip. If you check forums, you'll see that feedback is not so good; the chip quickly reaches its limits. Also note those Android-based devices are basically beefed-up Android tablets; so nothing to compare with a real media player.
As mentioned by WTE in post #8, there are now Sat receivers with HEVC chips, so with the right "driver" and "image", it should be possible. Since I don't use my DM as a media player, I'm not sure what the OpenPLI team would have to do to make this work.