This one’s really going back a ways. The description on this 2012 video says it’s a Newgrounds classic, and I was not a habitué of that site then, I’m sure it goes back to at least 2005.
It is a type of meme video that long time internet layabouts will recognize the irreverent take on some property, in this case Super Mario Bros. done up in a whimsical yet somewhat profane way. The highlight of the audio, though, comes after the introduction, where performers Group X do a voiced rendition of playing Super Mario Bros., including music and sound effects, back by drum and cymbal (and, later, bass). Being a part of gamer culture from that that you can expect some coarseness (like a crude Flash animation of poop being tossed at a toilet). Some people like that kind of thing I hear, I can’t tell you why.
The attributes of early Flash animation are prominently on display, like copious use of tweens. Flash is still around as an animation tool, and I presume tweening is still available, but with the death of browser-based Flash (not counting Ruffle) recall of the unique crappiness of badly-made shape tweens is rapidly fading from internet memory.
Well, there it is. Hey, it’s Sunday, I’m not supposed to be stressing about posts made today!