According to another Reddit user who responded to the original subreddit post the wall is actually an identical and fake wall located near the viral doorway that was featured in Elden Ring Runes the original video. They also posted a picture of it along with some spoiler information about the location of the wall and its location, which you can read here. It appears that the fake wall could be removed in the same way and with a number of smashes with an appropriate weapon. But it doesn't require nearly as many hits, based on the statistics you've gathered, players have claimed.

To be clear: The idea of secret, fake walls isn't what got Elden Ring players excited. The strange walls that conceal secrets are a well-known aspect that make up Elden Ring. These "illusory wall" are already thoroughly documented and understood. What makes these (and an identical) hidden wall so strange is that it isn't acting like the other illusory walls in the game, lacking the same sound signal to disappear, reappearing when you're at the Site of Grace, and needing dozens and dozens hits to open. Although at first, the footage made it appear that the wall could have been a deliberate design however, some players and experts are now suggesting that the strange wall could be an issue or a mistake left within the game's code by the game's creators.

The well-known Dark Souls hacker Zullie seemingly verified this notion--that it was an error that was made by the developers via a short Twitter thread. The hackers explained that after probing the game's data and digging into the fake wall they found the door's door display 9999 hit points. It's similar to the unbreakable objects found in Dark Souls having 999 HP. However, those items also have 999 defense which means they do not take the brunt of best place to buy elden ring items any attack. They are only broken through in-game triggers or events scripted by the devs.