Harry Potter TV Series

Imagine a Last of Us episode 3 type episode where we're introduced to new characters in a flashback featuring the Longbottom family.

Imagine seeing Alice Longbottom's story play out leading to her and Frank becoming pregnant with Neville Longbottom and finally giving birth on July 30th, totally in step with the prophecy. But instead becoming the boy that lived. Neville showed the magical propensity you would assume the prophesied one would have since he was able to magically adjust his own blankets to tightly swaddle himself just moments after being born. Everyone missed the incredible show of power. The midwife just assumed that Frank, the proud and cautious dad, had tucked his son in. This would be a theme for Neville's childhood that continued through school. Often overlooked and under estimated by those who loved him, not because of malice or ill intent, just because they weren't paying attention. And so it happened that the child who fit the prophecy perfectly, was over looked for the half-blood born on July 31st.

I mean...c'mon.
I really like this idea

Not as part of the seasons but stand alone episodes that can air between seasons

Multiple 1 - 3 episode spin offs, I like the Longbottom idea, we see Harry with the Dursleys before he goes off to Hogwarts each year, maybe show what some of the others are up to when at home, Hermoine with her muggle parents, even Draco. maybe even some of the teachers