This clip is a fan-made parody built around Linkin Park's Crawling, one of the band's best-known nu-metal songs, with its famous line about wounds that will not heal deliberately changed to crawls that will not crawl. The joke works because the original vocal delivery stays serious while the new wording is nonsense, which is why short-form creators and soundboard users have kept it as a quick reaction clip. It is less about the song itself and more about the mismatch between dramatic singing and a silly lyric.