Conesus, apologies if I'm wrong, but I suspect you might not have understood the core issue Daveguy is raising here. I don't think its about pairing devices.
When I watched the video, there was this huge awkward tension I felt: "How can all this functionality work with just 4 buttons?" which made me think "This product is probably a waste of time, I should close the video."
This is just one guy's gut reaction - although I see a couple of posters here saying something similar - but I really suspect this is a big part of why your campaign didn't work.
The value proposition is unclear:
You are selling a beautiful remote to control my home. But while it is clearly beautiful, it is not clear how it works as a remote. It looks complicated and like it probably won't work, because its not clear and never explained in the video how four buttons will suffice.
I did eventually scroll down far enough to read "Are four buttons really enough?" where I finally realized it was designed to be programmable but even this wasn't convincing (do I have to re-program it between doing all those things showed in the first video? reprogram it each day?), and I'd have bounced long before then if I hadn't come across this in a HN comment. It wasn't until I read that section multiple times I realized the bit about 4 different app profiles, where you hold the corresponding button to activate, and I was long gone by then. The fact that there seems to be a dedicated go-to-bed and wake-up button only confuses things more.
Strongly would advise you to go deeper on this, e.g. show people the video and afterwards ask them to describe how it actually works etc, ask them whether they think it has enough buttons, probe for confusion on that point that would have made them bounce etc.
You even seem to acknowledge in your comment that this is a stumbling block for folks:
>Ah-ha, we hit my area of expertise which is talking about how four buttons is all you need.
(I.e. you know this is something that is unusual/surprising and hence requires explanation)
But the video doesn't explain this at all, and I think that might be causing you to lose a lot of folks early on.