I'm kind of amazed this guy is fumbling so much with the drum brakes, to be honest - I concede that they're nowhere near as easy as discs brakes in terms of sheer parts, but if he would look at his FSM, that actually has a pretty detailed way of showing how to piece it together, deconstructed, front and rear...at least, my 1968 manual does.
Evidently, reading the comments here and on the YT video, this seems to be a theme - general ignorance of the machinery and a lack of commitment to the project. I won't try to judge because I never proclaim to be a super-mechanic, but if brakes are giving you trouble....hoooo boy...I'd hate to see him work on an engine.