This is late, but you know what, I have to give simpleflips credit for publicly disavowing executing your political opponents on college campuses. I kind of assumed a guy who sells rainbow keyboards would be in the "kill em all and let Science sort them out" camp.
Interesting vid, Nintendo has started copystriking stuff to do with Mario Builder 64, including vids about it and the main place it's uploaded. For reference, here's a link to the download page which is down now, an archive of that, and an archive of the page when it was up. For those who don't know, it's a very cool romhack of Mario 64 that gives you tools to create and upload your own levels Super Mario Maker style, and then play levels made by others (a concept like this was originally realized by romhacker Kaze Emanuar, but this is a very big upgrade). Simpleflips is running a hack contest like he does sometimes but for levels created in it. It's still true that you have the most control and can do more with a straight up romhack, but people have made some very cool stuff, and it appears that the accessibility is much greater because there are well over a hundred entries to the contest.
Simple believes that the fact they're striking it now points to them wanting to release their own 3D Mario Maker, so they're clearing out similar stuff so as not to compete for search results, and I guess protect their IPs. I couldn't find other sources talking about it than the video and that takedown page; I'm sure all the discussion is happening on discord. I doubt that this means the hack will be successfully stricken from existence, and I very much hope it is not. I think it's abundantly clear how important fans are to things like archiving and continuing support and quality of life upgrades for older games. Often when a company rereleases a game, fans will have been playing a version even better than the rerelease for years; sometimes companies have even relied on fan resources in order to prepare a rerelease.
In the case of Nintendo specifically, fans were instrumental in preserving the original Mario Maker levels and experience after Nintendo announced the shutdown of their servers for the game; as I understand it, the paid, normal experience of Super Mario Maker 1 is more or less a brick now, but hackers are free to enjoy at the very least the full existing catalogue of user levels. And romhacking for Super Mario World was incredibly fertile ground for creativity for years before the Maker series released. In fact, while the Super Mario Maker series is known for pulling in concepts across many games, there's one concept with an unusual provenance: the on/off block. While the switches were present in Super Mario World, they controlled the path of platforms, and not the solidity of other blocks; then in Super Mario Maker 2 that functionality was added without reference to prior games, as can be seen in this article from the incredibly autistic mario wiki (archive). What is missing from that article is the fact that this functionality was in fact first invented in SMW romhacks; here is a forum thread from 2010, 9 years before SMM2's release, where a hacker is asking for help implementing these, implying they are already a common trope; it is, of course, possible that everyone who worked on SMM2 was unaware of these hacks.
This is all to say that the fans' relationship to Nintendo is best understood as mixed at best, if not fundamentally adversarial. They make some great games, but the people who will always take a game to its highest potential, and ensure that it is playable for years to come, are the fans. I have no doubt Nintendo can create a great 3D Mario Maker game, surely better in many ways than Mario Builder 64; but it is also guaranteed that eventually they will shut down servers making it unplayable for normal users, and act with indifference or even hostility to those who attempt to preserve it. And while the accessibility of something like Super Mario Maker is much greater than SMW romhacking, and it includes online features undreamt by romhackers, the modest success of Mario Builder 64 (and the fact that it is an iteration on Kaze's original concept) demonstrates that with time, a fanbase will begin to bridge that gap and encroach on the features and usability of official titles. I very much hope that the creators will do what they can to preserve this project, because Nintendo won't do the same for their own games.
Possibly this might be of interest more broadly, so if you're aware of a thread where this would be relevant let me know, or feel free to just share.
Simpleflips is definitely on his "waiting for mario maker 3" arc. I can feel the raw "where the fuck is it nintendo" energy through the screen every time he uploads.
None of the retards in those replies can actually come up with a single real quote of the Kirkinator saying that troons should be executed in the street (He was not nearly that based)