There are about a dozen videos of the PCT method on Youtube. The things I would point out are that many don't hang them high enough or from the right branch - maybe this is a California thing but picking a nice broad branch invites cubs (or the momma bear) to go right out the branch to chew or tear the rope and drop the sack (heard many descriptions of this from folks who have hiked Yosemite before the era of the bear can). A live tree with green branches lets you get a smaller diameter branch. Getting the hang out from the trunk far enough and off the ground high enough is a matter of practice.

The other thing some bears here will do is climb the tree to a different branch, leap off it, and grab the bag on the way down. Unfortunately I don't have any tips for that other than to do as most of us do and just take the canister.