I think that was my video. I'm going to spend today updating it as it's a bit outdated now.
Stooop! I get nervous every time I open up system settings even though I have Tubehax set up. I legit had a dream last night that it kept trying to force update. Was very stressful haha.
I had to go the more expensive route and get an offline only 5.3.2 console and keep my original WWHD bundle. Since I didn't need the gamepad it only cost me $100. Then I had to fork over $40 for Smash Bros. I still think that's a great investment with everything that I'll be able to do with this console.
The red X means that you're blocking updates correctly.
Since you like video tutorials (you mentioned both my Loadiine and OpenDNS ones)
then you should check this out. Just posted that yesterday on how to use Tubehax DNS to block Nintendo's update servers. But really, all it requires is changing your DNS to 107.211.140.065.
Lol, I can't believe I memorized it.