> I too have watched Numberphile. Rest assured, there's little to no risk of their extremely popular videos being bad.
I mean there's the Numberphile where they claim that the sum of 1 to infinity is -1/12, supporting their claim by rearranging terms in an infinite series in ways that are not allowed, while not explaining that the actual topic that they are talking about requires both a different definition of equals and extending a pattern into where it is not properly defined. So yeah, even Numberphile can put out a trash video full of errors.
By the way, I just checked the dislike ratio using an extension and while that video was still mostly liked, it has about 20% dislikes whereas most of there videos are less than 1% dislikes, so while the dislikes didn't work perfectly, they at least did inform people that something was going on with that video.