https://3ds.hacks.guide/seedminer
requires a use of a .sed file - sounds familiar?
Further down, you can choose which method to use for seedminer:
Isn't bannerbomb in the title of the video?
And yeah: videos can be outdated, and you have to gonna find an updated video, if it wasn't linked.
Whereas the website will always have the same link, as this guide seems to be always updated.
So posting a video link 2 years ago (an example) might be outdated to readers now, but at the very least this guide this always updated, so it apples to whenever the readers click on it.
(tho of course, as much guarantee as that is, who knows if the URL is bought my bots in the future.)
In any case, I've used that link multiple times to hack my friends and my 3DS, and I've experienced all kinds of 3DS hacking across the ages