He teaches good proper technique. He is "colorful" too in his presentation, as you say, "insane". But this is just a teaching method as it actually helps you retain the information longer. If he just droned on in monotone then you wouldn't remember anything.
Pre-cleaning is a must to get the things off the lens that can scratch it when doing more detailed cleaning.
Using the disposables is also a must for the reasons he said. While I use Q-Tips if the optic is large I first use disposable cotton pads as easier to get a large surface done.
I generally use 91% alcohol and not 70%. At times though something gets on the lens that does not dissolve in alcohol so then will usually spot treat with saliva as the enzymes usually do the trick. Then redo with alcohol.
The final application with distilled water is also a best practice as it does not leave any solvents or other things on the lens.
Oh and he is so right with the never blow on your lenses. You think nothing but air is coming out but in truth millions of microdroplets of saliva are being deposited. If you don't believe it then clean a lens properly and examine its surface under a microscope at 50-100x. Then simply blow on it and re-examine under microscope. You will be horrified!! I did that once and not never ever blow on the lenses. Always have a lens brush with me in the field in case a skin flake or whatever gets on the eye lens.