For their study, a team of researchers looked at 595 different TED talks relating to science and technology, which currently account for around two-thirds of all TED talks. And they looked at the comments on each video, comparing those on the YouTube platform, to ones on the Ted.com version. They found that 72% of the comments on the Ted.com videos were related to the actual content of the talk – while only 57% of comments on the YouTube version were relevant. Even less surprising, 5.7% of the comments on YouTube were personal insults, compared to less than 1% on Ted.com