> Put differently, English-language videos comprised just 17% of the videos that were published by popular channels during the week, but they received 28% of all of the ...
or [1]:
> Of the top 250 YouTube channels, 66% of the content is in English, 15% in Spanish, 7% in Portuguese, ...
There's quite a distance between "all the best content in STEM field and on YouTube is in English" and "all the content is in English" and a lot of qualifiers gets in there.
0: https://www.pewresearch.org/internet/2019/07/25/popular-yout...
1: https://en.wikipedia.org/wiki/Languages_used_on_the_Internet