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The US Chemical Safety Board channel. They do mini documentaries on chemical/industrial disasters that they investigated. Some of them are relatively in depth:
by yimmothathird 2y ago
The US Chemical Safety Board channel. They do mini documentaries on chemical/industrial disasters that they investigated. Some of them are relatively in depth: https://youtube.com/@uscsb https://youtube.com/@uscsb
Most videos are probably a bit shorter than 20min, but they do have several in that range.