Here is my randomly selected selection of oldies but goldies:

The debut of plug-in type Asacoco
https://www.youtube.com/watch?v=_puDclj10Og
Haachama vomiting after eating spicy ramen (this one is kind of sad knowing how she reluctantly had to embrace the meme)
https://www.youtube.com/watch?v=ovHeHQm3pbg
Subaru showcases her cool singing voice with Daddy Daddy Doo
https://www.youtube.com/watch?v=QRMivzBiJnc
Akai Haato x Watame long compilation (before she became Haachama)
https://www.youtube.com/watch?v=E9ce4WsDCQE
Roboco's 3D butt
https://www.youtube.com/watch?v=nsxWN7S8Ivo
Rushia accidentally spoils a big reveal and freaks out
https://www.youtube.com/watch?v=6FR1CZiY57Q
Okakoro rapping stream
https://www.youtube.com/watch?v=wVOHaMd3utA
Luna triggered by Haachama cooking
https://www.youtube.com/watch?v=TIR1m99B4wI
Towa's part time job
https://www.youtube.com/watch?v=f2AUvoWliI4