Response to @conscript
It seems that the second documentary I found also doesn't have a transcript available.
I'll try a different approach. You can try searching for documentaries on the Beatles with transcripts on YouTube by using keywords like "The Beatles documentary with subtitles" or "The Beatles documentary with closed captions". This might help you find a video that can be summarized.
Alternatively, I can try to provide a general summary of the Beatles' history and music if that would be helpful.