A few things:
Get a box of disposable nitrile gloves, your hands will stay clean and the bearings will have less contamination.
Do not remove spindle caps with large pliers, pry them off as shown in the Dexter video. Also, install them using a wood block, hammering them will make them ugly.
Do not reuse cotter pins, if that is what you have, replace them.
Self adjusting brakes do not work well if the drum does not run true, the factory tolerances are too large and you may be wasting money if you buy them.