I think whoever wrote the BBC article has added two (FTA rights) and two (Sky Sports Mix) together and made five (new FTA channel).
Anyway, it's not necessarily a given that Pick will show the British GP and highlights of the others - they could go to another broadcaster still.
Asked by Autosport whether C4 would wish to continue as a highlights-only provider from 2019, the channel's head of F1 Stephen Lyle said: "It's a bit early for that because we've only just picked up the news.
"As far as I'm concerned the news that broke yesterday doesn't affect our contract we have at the moment, so nothing has really changed on that score in terms of how we are approaching it.
"We'll obviously look at it and then look at what to do from 2019 onwards."
As to whether C4 was aware of Sky's announcement, Lyle added: "As you can imagine we've been concentrating on delivering F1 for this season, and the next two seasons.
"It's been a job to get it altogether that quickly, so that is where our heads have been at.
"At the moment all I'm doing is concentrating on what we have. We've Bahrain coming up, and what we'll be doing for that programme and the coming season."
I do think it unlikely that any of BBC, ITV or C4 will send their own commentary teams to all of the other races just for highlights unless they are also employed as world feed commentators or contracts are formed with foreign broadcasters. If that's the case you'll probably see a couple of presenters do the wraparound coverage of the British GP and present/voiceover highlights of the other races from a UK studio.
Of course, if no other broadcaster wants it and it ends up on Pick, that'll be produced by Sky.