Note: I have no medical experience what so ever, but I’ve seen quite a few similar discussions regarding sterility / self-installation on here or in the Discord server before. In addition - I in no way recommend self-installation, and I would have wanted to see this be professionally installed. Saying that, some thoughts:
In this case, since the main thing gloves are for is protecting the installer, gloves are more likely to give a false sense of security than anything else. Saying that, if you’re handling a flex device or xSeries implant directly, it might be a good idea to use sterile gloves, unless you’re very very sure about your scrubbing technique. That’s one thing to note - unless they were sterile gloves put on correctly, they could very well be even worse than properly washed hands.
The main thing would be making very sure that your gloves fit you properly. For example, surgical gloves usually come in 7 or 8 sizes, vs the standard 5 or 6.
Maybe this was the case - but clearly it hasn’t fallen out. That’s something that they don’t have or perhaps haven’t look at - pictures of the healed installation. Sure, almost certainly you were lucky, and I’m surprised it went so well, but that doesn’t change the fact that so far, it seems to have healed quite well.
And yeah… a disclaimer would have been nice, ideally in the video as well as in title and/or description.
Honestly, I feel the main issue here is the lack of respectful communication on their part - if you look back to when you were asking question about doing it, there were many people here who said similar / the same things. I think the difference is that people here conveyed it in a better way. Some of the concerns we had were addressed (you didn’t use Ketamine for example), and some weren’t 
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At the end of the day, whats done is done, and you have a magnet in your finger. Probably just don’t go around recommending others to do the same 
. From your reddit comment, it seems you already understand this / that a disclaimer is a good idea, which is good to see.
I’m hoping that those with a bit more medical / installation / sterile technique experience also weigh in - there were quite a few things that I don’t know enough about to address. To those with more experience: please correct me / pull me up if I’ve put any incorrect information out there, that is not my intention and I too would like to learn more.
Some threads to look at: