Excellent tutorial.
Having worked in the electronics manufacturing industry for many years before, and actually being what would be considered an industry expert in the field of soldering (process engineering with customers and teaching soldering classes) I can tell you that everything that was covered in the video was spot-on accurate.
He covered pretty much every key point too....and did an very nice job of explaining things and gave good visual representations.
So...my contribution here would be to say that take what has been covered in this video as being very accurate and very reliable information!
To the tutorial author, whoever you are, kudos!