I didn't really know what a neutrino is but I watched this and now I know, it was good: The physics anomaly no one talks about: What's up with those neutrinos?

I didn't really know what a neutrino is but I watched this and now I know, it was good: The physics anomaly no one talks about: What's up with those neutrinos? https://www.youtube.com/watch?v=p118YbxFtGg https://www.youtube.com/watch?v=p118YbxFtGg (Sept 2021, 12 minutes)