PewDiePie, the online name of Swedish creator Felix Kjellberg, built one of YouTube's largest audiences in the 2010s with gaming videos, reactions and meme reviews. His can you do this line became a reusable clip from that era, detached from any single video and passed around in edits, compilations and soundboards. Fans use it less as a quote and more as a prompt, a shorthand challenge that needs no setup. Its staying power comes from that simplicity and from PewDiePie's instantly recognisable delivery, which older YouTube viewers associate with early meme culture.