Long Division

The vid is intended for students who have been using short division successfully for enough time that they are fully confident with the process. It is NOT intended as a student's first ever encounter with the division process. When those students see this video, the process of long division will click quickly for them.
My view is that long division is best for when there is a large divisor, because when there's a big divisor, you can make mistakes if trying to find the remainder by mental math.
I advocate the use of a mini-table of multiples. It's good for students to think in terms of patterns of multiples and this helps them do that. Breaking the math into 2 stages helps students who struggle because they have distinct chunks of work to do. This will allow the process of the division to take place more smoothly, and that's a MASSIVE help to students. Yes, they spend a bit of time on multiplying some values they won't need. But the end game is an easier time during the division process and this will get them there.