I really like this video… I view the instructions for how to keep bears out as the same as simply composting properly.
Any time you add food scraps to the pile, be sure to cover it with brown materials. This will balance out the green material while not attracting pests.
Personally, I don’t find the aeration step necessary. If you add your materials as stated, the pile will cook and you will get good results. These compost bins are good, but be sure to check that air can circulate through the bin to some extent.