Before 2013, "Behind the Scenes" content was promotional fluff. Netflix’s The Movies That Made Us changed the tone. It was fast, irreverent, and brutally honest about the financial collapses and drug habits of 80s action stars.
If you are planning your own project, experts suggest focusing on five key elements : The backbone of any factual story. Archival & Interviews: Building a multi-layered narrative.
The industry is currently facing a period of "creative deficit" and economic restructuring: How AI could reinvent film and TV production - McKinsey
If you want to understand the industry, start here. Each covers a different sector.