Sorry for my late reply. Please post original link of the video where you watch it in the browser. When I'll have that link, I'm going to test and rewrite the guide for your personal case. I also hope we don't need an account for that, but as far as I know voyo cannot be accessed without a paid account.
You must use my previous guide to find the key in Fiddler, then save it as the keyfile. This is the only thing that's left for you to do and this is the reason you get the error in ffmpeg command line response.
And yes, "troller12" is right, each m3u8 is for a different video quality and that number is actually the bitrate of the video in bps I think.
LE: Never mind, I tested with your
link above and it's working. You got the key file correctly, but you edited the m3u8 the wrong way. After you download the above m3u8, you have to edit it and use the replace function in notepad to replace "159764-d415cfea8fa04e84b60543d1ffaab521" with "http://cdn.drm.protv.ro/voyo/2017/04/10/159764-d415cfea8fa04e84b60543d1ffaab521.ism/159764-d415cfea8fa04e84b60543d1ffaab521". Please take into account that you have to actually use the same path as the m3u8, but you have to pay attention to the fact that notepad replace with cannot be very long, so you have to replace only a part of the link, but you have to make sure it matches perfectly. Also, do not forget to replace the keyfile link with the local *.key file. It should work now with no issues with your key file provided, I tested it a minute ago and it works.
So you must pay attention to the m3u8 renaming of all ts parts according to the original location of the m3u8.*
P.S. Too bad they didn't update the database for Apropo TV and Romania Te Iubesc, but luckily for us, we have IceTorrent and SceneFZ trackers to download MOO/iREAL releases...