The clip comes from Cyberpunk 2077, the 2020 open world role playing game set in Night City, where Keanu Reeves plays rockerboy Johnny Silverhand. Short voice lines from the game were quickly cut into soundboard clips and edits, and this greeting spread with the deliberate misspelling Wellcum, which became part of the joke in titles and comments. It remains popular because the line is instantly recognisable to players, works without any visual context, and can be reused as an ironic welcome in gaming videos, streams and chats.