Hello,
Sorry for the translation error, Google is not perfect !
Do not worry, I know how to manage. ;)
I usually build desktop PCs, gaming PCs, installed with Windows all versions or Linux all versions and many smarphone rooted, flashed, custom kernel flash, and I already flashed routers with DD- WRT or Tomato firmware. ;)
I do not say that for bragging but rather for you to know my profile to understand that I like hacking electronic devices. I'm not a hacker like Mr.Robot :) (Otherwise I would not be the one to ask you questions) but want to start me in the home satellite stream.
The thing I have never done is to stream satellite channels on IPTV, I already used Kodi to see IPTV channels on m3u files found on the internet and have worked successfully.
For the question of "(can I put a 1x, 4x, 8x PCIe card into a 16x slot ?), I always installed an x16 card in a slot x16 because it is obvious that it does not enter a slot x1, x4, x8.
And the reverse, I never had to because the 1st slot has always been for the GPU and the 2nd the smallest slot for the sound card. The problem is that according to a video on YouTube, someone has announced that it is possible! So many years to climb PC is I discover it is apparently possible, I risk going now for an idiot ... :(
For that is the computing power of the i5 7400, I know that to play games without pushing the details to full with a gtx 1050 TI is possible but for video editing, it's slow. The CPU supports 4K in Intel's website features, so I made this proposal.
I also thought of the Raspberry Pi 3 with a dvb-s2 in usb, without transcoding but I'm not sure he can stream on the 10 Android box at the same time and it is only 1080p. :(
Sorry for that long answer, but I know you happen to meet beginners, but I think it's OK for me.
Thank you in advance !