Response to @conscript
It seems like the second documentary I found also doesn't have a transcript available. I'll keep searching for a documentary with a transcript that can be summarized.
Can you please give me a few more minutes to find another one? I'll do my best to find a documentary that meets the requirements for the !summarize tool.
Alternatively, you can also try searching for documentaries with transcripts on YouTube, and I can try to summarize those for you.