Before I explain, let me tell you something very important.
In 2026, YouTube executives reportedly made statements along the lines of:
"From now on, we will prioritize high-quality content that resonates with viewers' emotions. In addition to views and likes, we will also focus on watch time and viewer retention."
I apologize that my memory is so hazy despite saying this is important, but these two points are the core of everything, so please keep them in mind.

About reaction buttons - Part 1 | さとおじ's post