[gus_massa]

Not sure if this is what you want, but I like:

The post of Mathologer about 1+2+3+...=-1/12 , probably https://www.youtube.com/watch?v=jcKRGpMiVTw

The post of Minute Physics about the Higgs Boson , probably https://www.youtube.com/watch?v=9Uh5mTxRQcg