Yeah, I saw that Chicago video a few days ago. It was interesting.
ZackTV actually gave a lot of coverage to the Brooklyn drill scene in the mid-to-late 2010s before he died. Unfortunately, rap fans didn't care about NY drill back then but the scene did sprout into something bigger afterwards.
Akademiks covered one cluster of BD sets (300, 600, Lamron and O-Block) and a few of their enemies. Recently I found out there's another cluster of four BD sets not too far away and they got their own world. Rappers from the two territories didn't even collab even though they were cool with each other.
Trap Lore Ross expanded the coverage wider in the Southside but it's still mostly beefs between BD, GD and Mickey Cobras and he focuses on rappers.
There's YTers that got videos interviewing California OGs from way back talking about their set's history and there's an avalanche of videos talking about prison politics, street politics and history. There's very little of that for Illinois.
There's always been websites that talk about the history of active and extinct Chicago gangs but it's hard to verify or get into details. It would be so much better to get stories from the source from OGs and leaders that actually did time or who moved on in their lives.