His exact words were "for about 5 seconds, just the slightest bit of fog" I think we can agree that was not the case. Also if I was in a "super critical situation" my priorities would be to get myself and my passengers safely out of the situation, and not do any youtube-selfie thing. However, I'm glad he did so we got the opportunity to have this discussion.
I've had my fair share of poor weather flying, also in winter conditions, and to completely eliminate the possibility of icing conditions while doing aerial work would eliminate a big part of winter days. But your cloud descending experiences sounds really scary, and I think it is really important for any of us flying in possibly icing coditions to remember the real danger included.