Not a bad video you made there.
A couple of small things. You suggest hitting the spindle with a hammer to get the old motor out. The problem with this advice is if they make a mistake and want to remove the new motor (lined it up wrong, wire fell off, whatever) they use the same hammer to get the new motor out as well. This kills the new motor stone dead before its fitted.
You put it shaft down to the floor, no banging, grasp the housing with both hands and gently push.
For this reason, we have this disclaimer on our DC33 motor
Important condition of sale: Our motors very seldom fail prematurely when fitted by an experienced engineer using fresh filters. Occasionally, amateur fitters try to return them as "faulty" having used a hammer on the shaft. A hammer should NEVER be used on a motor shaft. In the unlikely event of a return being needed, it will be immediately disallowed if there is ANY evidence of a hammer having been used at all.
Yet people STILL try to return new motors as "faulty" where the shaft has been leathered with a hammer.
I'd like to suggest a proper T15 screwdriver
instead of the Alan Key type you have there. Much faster.
And Vaseline is OK, but so is a smear of washing up liquid, a spray of silicone dash shine or furniture polish into the housing.
I'd also disagree with you that the belt removal tool
is a waste of money. People love them. I was first to bring them into this country from the US in 2011 and we still sell them. What if you fit a new clutch too? Good luck with pulling a new genuine clutch belt through the hole with your foot on there - not happening.
Belt removal tool video >>here<<
so people can see the alternative.