https://www.strategic-culture.org/news/2014/04/08/less-ameri...
(also here:
https://www.washingtonpost.com/news/monkey-cage/wp/2014/04/0...
)
Most people answering a 2014 poll (hopefully uniformly sampled) could not locate Ukraine on a map of the world, with many placing it in Africa, East Asia, Greenland or even the US; but the more interesting part was that the farther from its actual location was people's guess, the more they were supportive of US military intervention in Ukraine.
A couple of people-on-the-street interviews will never ever give you an accurate representation of "a large percentage of the population".
Edit: see also this comment- https://news.ycombinator.com/item?id=29889236
What gets me is how easily inexperienced people are led to saying exactly what the interviewer wants. And it is blatant: they don't even pretend that isn't what they are doing on live news anymore.