I have 2015 Toyota Venza 3.5L AWD automatic transmission with 109500 Kms. I am going to change the transmission fluid on my car. So I searched on YouTube how the other people were doing it. There are so many different procedures and methods of changing transmission fluid that people are showing on the YouTube. So I am confused who’s doing it correctly. 
I also watched Scotty Kilmer video replacing transmission fluid on his Son’s Toyota Sienna. It was very straight forward and very easy to perform. So my question is Should I just follow your procedure to replace the transmission fluid on my car. 
I owed this car since brand new.There is no issue with the transmission or anything else in this car. No leakage of any fluid. Absolutely clean under neath the car. So should I just drain the fluid and put back the exact same quantity fluid back in it transmission?

Thank You 🙏