It's sort of counter-intuitive that this would be the case because after something fairly radically new becomes popular there's so much positive said about it.
It's an easy leap to assume that praise was always present, and that lack of it in your case is a signal that what you're working on won't succeed—but it seems like in actuality, when you're doing something novel enough people aren't going to 'get it' immediately by definition.
It's also easy to assume that those you speak to about your work will approach it with the optimism and energy with which you regard it, and without a little optimism and sustained attention it's easy to miss the potential or even comprehend the significance at all of some new idea.
Even having acknowledge this concept in the past, I still needed the reminder in the video to see I was potentially making the mistake again in my own project. It's a good point to remind yourself of periodically.