BITCONNECT is a sound alert of Alluux saying "Bitconneeeect! Wassa wassa wassa aww fuck".
The clip comes from a stream where Wubby and Alluux play giant fear pong. The clip occurs at 2:35 of the highlight channel video of this stream.
Alluux says this in reference to another video of the Bitconnect CEO repeatedly shouting "BITCONNECT" at a crowd to hype them up.