I watch speedruns all the time. New personal bests, and world records are great to watch - especially live, but I don't understand their prevalence in news stories. The speedrunning scene seems a bit niche for individual runs to show up on general games sites. A new world record is likely pretty indistinguishable from one set a year ago to a casual observer, with some exceptions.
I suppose everyone who watches speedruns has to be introduced somewhere, and it's cool for people like Cosmo to get some more recognition.