Tactically Acquired, who describes himself as a Temu version of the Fat Electrician, posted a video on YouTube titled "America's Forgotten Spies Who Beat the British Empire | George Washington's Culper Ring".
At a little over an hour long, I thought it was a good video and comes across as factual.
I don't mentally flag profanity, so there may be some in there, but I think it's generally clean.