Those videos are excellent! and that's exactly how they do in the salons. I have been doing my own hair for a while now..... I was normally going just for touch ups and the maintenance I would do myself.
My results have been fine for me. Most recently I have begun doing my own touch ups.....I do miss the salon at times ( for the sheer pleasure of having someone else deal with my hair but, the blowouts would definitely make my hair flatter than when I did it myself.
Practice, practice, practice is all I have to add.....it doesn't happen overnight and make sure you have all the tools you need.
Right size brush
protective spray, cream or serum whatever you hair works well with,
hairdryer with nozzle ( very important, concentrates the heat so its aiming exactly where you want it to go.)
Clips, claws
patience
strong arms
enough time to do it right
Good luck