I really like BJJ Scout's videos. This one on Maia is great. There'll be a 2nd part too which I'm looking forward to watching.
They linked to this analysis of Maia's MMA game by Gambledub (remove space between docs. & google): https://docs. google.com/document/d/19slUdRluinXLuibxVwetvee3bg0Lvm8BhhVENyra9V0/edit?usp=sharing
It's a pretty long read with heaps of gifs. It's amazing.
There's a list of other studies here (remove space between docs. & google): https://docs. google.com/document/d/1K0NlrWX6uynMpxsaFznY9Eav9AU9a2KLYLKBIJ2jmis/edit
I haven't read it yet, but the Charles Oliveira one should be great (remove space between docs. & google): https://docs. google.com/document/d/1v57AsTxAkZsxoVRUfoEw1tKRk_yq6v6Tyq709ysFjaE/edit?pref=2&pli=1