Perhaps, but people watching the video might not understand that blowing in the cartridge is part of the problem and shouldn't be done. Mentioning that at some point in the video might have been helpful to people. Also, I would have mentioned that you should properly clean all your games if you're going to bother doing this to your NES. In fact, my NES has never been cleaned. And I've not bother to do any refurb on it, despite the fact I've done it for quite a few other people. It had a lot of problems playing my game until I opened each one up and gave it a proper cleaning. Now all of them work the first time every time.
I must say that I was pleased that you mentioned the little tab on the bottom of the cage that needs to go under the main board. I've not seen a video yet that does.
You might know that, but in your video it seems like you're saying that the lockout chip is the cause, not a symptom. You don't mention the problem of the pins not making contact with the cartridge.