Watch the video here...
KSI got knocked down at WrestleMania XL.
YouTube and rapper KSI joined United States Champion Logan Paul on Friday Night's SmackDown to make a historic announcement.
The Prime partners revealed that their PRIME Hydration drink is now the new sponsor for WWE's Premium Live Events.
However, during the announcement, Randy Orton RKO'd KSI.
Watch the video here:

JISOO is releasing new music
Ashe releases new version of 'Stop The Wedding'
Hunger Games soundtrack revealed
Justin Timberlake to star in new documentary
Mariah Carey launches her Christmas campaign